Author: Mark Valderrama

Aquarium KH Explained: What I’ve Learned Managing It in Reef and Freshwater Tanks
KH comes up constantly in this hobby, and my approach to managing it has evolved quite a bit over 25 years of keeping both freshwater and reef tanks. In a reef setup, it’s about regular supplementation to keep levels stable. the coral depends on it. In freshwater, the smarter play is usually to stop trying to fight your source water and instead match your fish to what naturally comes out of the tap. That shift in thinking. from “how do I fix my water” to “what fish work best with my water”. makes the hobby a lot less stressful and a lot more successful.
Key Takeaways
- KH (Also known as carbonate hardness/ buffering capacity) is one of the most important water parameters in a fish tank.
- Aquarium KH levels buffer the pH of your water and help to avoid pH swings that can harm your fish.
- KH levels naturally decrease over time, so it’s important to test your tank water regularly.
- You can raise or lower KH in your aquarium, but it may be better to choose fish that are suited to your natural water parameters if you’re new to the aquarium hobby.
What Is Aquarium KH?

Aquarium KH measures the concentrations of carbonates and bicarbonate ions dissolved in water. These concentrations vary depending on the geology of your area, so your tap water may have different levels to the next state or town.

You can measure and adjust your KH levels at home using products that are easily available at pet and local fish stores. A range of about 4-8 degrees or 70-140 parts per million is generally recommended for most freshwater aquariums, although different fish and plants have different water parameter needs¹.

Why Does It Matter?

Minerals are essential for fish health, but they also play a vital role in regulating your aquarium water chemistry. The minerals that determine your KH levels ‘absorb’ natural acids and prevent them from changing your water chemistry.
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Author Note: You can think of KH as a sort of safety net for your aquarium. Without the buffering effect of KH, acids in the water can have immediate effects on your water chemistry, and that can be harmful to your fish.
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So, the higher your KH, the more potential it has to neutralize or ‘buffer’ acids in the water before they can affect your pH.

What Is The Difference Between KH and GH?

GH (general hardness) is another important water chemistry parameter that is often confused with KH. While KH is a measure of carbonate and bicarbonate ions, GH describes the levels of magnesium ions and calcium ions dissolved in the water.

General water hardness does not have such a direct effect on pH levels, although hard water typically measures higher on the pH scale.

What is pH?

pH (short for ‘Potential of Hydrogen’) is a chemical measure of the acidity or basicity of a liquid. All liquids have a pH level, including your tank water.

The pH scale ranges from 0 to 14. Aquarium water between 0 and 6 on the pH scale is acidic, and from 8 to 14 is basic. Neutral water is right in the middle at 7 on the pH scale.

You can measure pH at home using an aquarium test kit, and it is possible to adjust your pH levels, although it’s better to aim for a stable pH than to chase a specific number on the scale.

Why Does pH matter?

Each fish and aquatic plant species has a preferred pH range, although many species are pretty adaptable as long you can maintain a stable pH.

Some aquarium fish do well in pH levels as low as 5 (discus) and as high as 8+ (African cichlids), but most freshwater fish prefer a stable pH level between roughly 6.5 and 8.

Maintaining a stable pH level can be difficult if your water has a low KH or buffering capacity, and rapid swings in pH can cause major stress on your fish.

What Affects pH Levels?

KH and pH are usually related in the aquarium, so if you have a low KH, you’re likely to have a low pH too. If you’d like to adjust your pH to keep specific fish species, you’re going to need to change your KH first.

pH levels tend to decrease over time, and the change can happen gradually or even suddenly in the case of a pH crash, but what causes these changes in water chemistry? Let’s take a look at four common causes of aquarium pH shifts.

Nitrates

You’re probably familiar with the aquarium nitrogen cycle, and how beneficial bacteria in your filter convert ammonia from fish waste into nitrite and nitrate. Well, nitrites and nitrates are acidic, which means they lower the pH of your water.

The best way to manage the nitrates in a fish tank is by performing regular water changes to remove them from the system, but you can also reduce the build-up by understocking your tank, growing live aquatic plants, and avoiding overfeeding.

Tannins

Have you ever added a piece of driftwood or some almond leaves to your tank, only to see the water stain yellow or brown?

Indian Almond Leaves

These leaves can be added to your aquarium to help promote a natural habitat for bettas, shrimp, and other soft-water loving fish. Betta breeders can use these leaves to help encourage breeding behavior.

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Tannins are acidic chemical compounds found in plants that can leach into the water, causing the ‘black water’ seen in many tropical freshwater environments. The effect is usually pretty weak, but tannins can reduce the pH in a freshwater aquarium, especially if you have low KH levels.

Carbon Dioxide

Carbon dioxide is acidic, which means it lowers the pH of aquarium water. Many aquarists use pressurized CO2 to increase plant growth, which is perfectly safe as long as the system runs on a timer to switch off at night when plants no longer photosynthesize. During the night, pH levels rise as the CO2 leaves the system.

Substrates and Rockwork

Crushed coral or dolomite substrates and limestone-based rock work like texas holey rock can increase the pH of acidic water.

Great For African Cichlids

Texas Holey Rock Natural Limestone

With its ability to raise pH and hardness, this rock is an excellent choice for African Cichlids

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How To Test Carbonate Hardness

So now you know why KH is so important for maintaining healthy water chemistry, but how do you manage something you can’t see, touch, or smell?

You can test your water’s KH levels or buffering capacity at home using water test kits. Most strip test kits will measure KH, and these are a good option for testing general water parameters. However, liquid test kits tend to be more accurate, even if they do take a little more effort.

Start by measuring your source water, whether it comes from a tap, a well, or any other source. This will give you a good baseline reading that you can monitor over time.

Now, KH levels tend to decrease over time as acids are released into the water, so you’re going to need to test regularly to find out how long you can go between water changes or treatments. Once a week is a good schedule if you’re starting out with naturally low KH levels.

Suggested Carbonate Hardness

So now that you know what carbonate hardness (KH) is and how to measure it, you’re probably wondering what your levels should be in your tank water. The answer depends on which kind of fish you keep, so keep reading to learn about suggested levels for specific fish types.
- African Cichlid Tank: about 200 – 400 ppm/ 11-22 dKH
- Discus Tank: about 50 ppm/ 0-3 dKH
- Planted Tank: about 50 – 100 ppm/ 3 – 6 dKH
- Brackish Water Tank: 200 – 400 ppm/ 11 – 22 dKH
- Koi Pond: about 125 ppm/ 7 dKH
- Shrimp Tank: 18 ppm or 1 dKH for Caridina shrimp. 54 – 180 ppm/ 3 – 10 dKH for Neocaridina
- Typically Community Tank: 70 – 140 ppm/ 4 – 8 dKH
- Saltwater Tank: 140 – 2000 ppm/ 8-12 dKH
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Author Note: KH is described either as parts per million (PPM) or degrees (dKH/°KH), and one degree is roughly equivalent to 18 ppm.
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The figures mentioned above are good general guidelines, but you should definitely research the preferred KH range of each fish species you keep to make sure you can provide a healthy tank environment. Remember, each fish in a community setup should be comfortable in the same tank.

How To Adjust Levels

Sometimes you need to adjust your KH to keep certain fish species or to increase your tank’s ‘safety net’ against pH swings. Continue reading to learn how.

How to increase carbonate hardness

Water Changes

Carbonate hardness naturally decreases over time as acids are neutralized and carbon escapes the tank in the form of carbon dioxide. Performing regular water changes and sucking up decaying organic matter from the substrate will remove acidic nitrates from your water.

Topping up your tank also reintroduces carbonate and bicarbonate ions to increase your KH levels. However, water changes are not going to increase your carbonate hardness above your source water’s (tap, well, etc.) natural KH level.

So how do you increase KH above the levels of your source water? Continue reading to learn about five things you can add to the water to increase your KH.

Alkaline Buffers

Alkaline buffers, like the range produced by Seachem, make raising and maintaining your KH levels very easy. These products provide excellent dosage instructions to make your adjustments much safer and more precise.

After regular water changes, alkaline buffers are the best option for beginners, and you might even find a product designed specifically for the type of fish you keep.

Crushed Coral

Crushed coral is mostly made up of calcium carbonate, which is great for increasing your water’s buffering capacity.

Crushed coral is my go-to recommendation for anyone who needs to raise KH in a freshwater setup. It’s inexpensive, widely available, and low-maintenance. you can mix it into your substrate or tuck a mesh bag of it into your filter’s media basket and let it work passively over time. Unlike baking soda or liquid buffers, it releases slowly and won’t cause sudden swings. I’ve pointed more beginners toward crushed coral than any other KH solution over the years.

It is easy to find and easy to use, simply pick up a bag from your local pet store or order it online and mix it in with your gravel at the bottom of the tank. Alternatively, add some to your filter’s media basket in a mesh bag.

Aragonite and Dolomite Substrate

Aragonite is a natural form of calcium carbonate, which is the same mineral that makes up crushed coral. It has a fine, sand-like texture and it makes an ideal substrate for raising KH levels in African Cichlid tanks.

Great For African Cichlids

Carib Sea Aragamax Sand

Boosts pH
Aragamax is great for African setups as it keeps pH and hardness levels stable

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Dolomite is a mineral composed of calcium magnesium carbonate. It is another popular substrate that raises both the KH and general water hardness of your tank water.

These substrates provide a long-lasting effect, but you can’t remove them without completely draining and re-scaping your tank.

Baking Soda and Soda Ash

Baking soda (sodium bicarbonate) and soda ash (sodium carbonate) are easily available and highly affordable minerals that can be used to raise KH and pH in aquariums.

However, they must be used very carefully since they can cause sudden and powerful swings and may need frequent dosing to maintain stable KH levels. While they can be effective, they are not as safe or easy to use as purpose-made aquarium alkaline buffers.

How to Decrease Carbonate Hardness

Some animals, like Caridina shrimp and discus fish, need very soft water to stay healthy, so what do you do if the KH levels in your source water are too high?

It’s not practical to remove carbonate hardness from your tap water, so your best option may be to cut your high KH water with something with a lower carbonate hardness. If you want to go really low, you may need to switch to a completely different water supply.

Here’s the honest advice I give every beginner dealing with high KH source water: the path of least resistance is almost always choosing fish that prefer those parameters rather than fighting to lower them. African cichlids, guppies, and mollies thrive in hard, high-KH water. and they’re genuinely beautiful, interesting fish. Going to great lengths with RO systems and buffers to chase low-KH conditions for discus or Caridina shrimp is a rewarding challenge when you get it right, but it’s genuinely hard to maintain consistently. Know your source water first, then choose your fish accordingly.

Let’s take a look at some of the best options.

Reverse osmosis water

Reverse osmosis (RO) is a process that removes minerals from water by passing it through a membrane, leaving it with practically no carbonate hardness. It is safe for use in aquariums, but only if you add essential minerals to the water using products like Seachem equilibrium and Alkaline Buffers.

My Pick

Seachem Equilibrium

A great remineralizer for freshwater tanks. Best used with RO, RODI, and distilled water. Completely aquarium safe

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You can also mix RO water with your regular source water to reduce your KH levels, although you’ll need to use your test kit to work out the correct ratio for the type of fish you keep. A 50/50 mix of this pure water and your regular water will halve the KH and GH of your tank water.

Reverse osmosis is often available for sale as drinking water, but using this in your aquarium will become expensive, especially if you have many fish tanks. RO filtration systems have become more affordable and easier to source, so it might make more economic sense to set up your own dedicated system in the long run.

Distilled Water

Distilled water has similar properties to reverse osmosis water but the purification method differs. This water is purified by boiling and collecting the evaporated H2O molecules.

Pure distilled water contains none of the minerals that fish and aquatic plants need for healthy biological functions, so you should not use it without adding minerals or mixing it with tap or well water.

Buying distilled water is a good option for small freshwater tanks, but it will get expensive for larger aquariums.

Organic Matter

You can also decrease your KH levels a little by adding aquasoils, driftwood, and peat moss to your tank, although the effect may last just a few weeks or months.

Reducing the frequency of water changes is another possible option, but you will need to monitor your nitrate levels carefully to prevent any health issues in sensitive fish species.

Acid Buffers

You can also lower the KH levels in your water using purpose-made aquarium products. Acid buffers convert KH into carbon dioxide, which can be great for freshwater aquariums with live aquatic plants.

FAQs

What is KH in fish tanks?

KH (also known as carbonate hardness or buffering capacity) is the measure of carbonates and bicarbonates dissolved in the water. It is an important water parameter in both saltwater aquariums and freshwater aquariums that stabilizes the pH levels.

Is KH and GH the same thing?

GH (general hardness) and KH (carbonate hardness) are both important water parameters, although they have different effects in a fish tank. General hardness measures the dissolved calcium and magnesium ions, rather than the carbonate and bicarbonate ions in the aquarium water. While KH and GH levels tend to be related, you should always test for both.

Which fish can live in high KH?

Many popular aquarium fish thrive in water with high KH levels. African Cichlids, livebearers like guppies and mollies, goldfish, and brackish water fish are all examples of fish that prefer water with high pH, GH, and KH water parameters.

Final Thoughts

KH is an important water parameter that all aquarists should understand, especially when keeping sensitive fish or species with very specific pH requirements. Fortunately, you don’t have to be a qualified chemist to understand the basics of aquarium water chemistry.

A good quality water test kit and half an hour each week for a quick water change is usually all you need. However, there’s also a range of excellent products available to the modern hobbyist that can make managing high or low aquarium KH levels really easy.

How do you manage the KH levels in your aquarium? Let us know in the comments below!

🐟 Want to learn more? This article is part of our complete Aquarium Care Guide. your ultimate resource for water chemistry, maintenance, feeding, disease prevention, and everything you need for a healthy tank.
November 8, 2023

The 21 Types of Butterfly Fish: My Honest Guide After Keeping Them

Expert Take | Mark Valderrama, AquariumStoreDepot

I’ve kept butterflyfish in my tanks over the years, Raccoon and Copperband specifically. They’re some of the most visually striking fish in the saltwater hobby. But I’ll be honest: I don’t keep them as often as I used to. They’re sensitive, most species are corallivores that will destroy a reef, and weaning them onto prepared foods is a genuine challenge that many hobbyists underestimate. Most butterflyfishes sold in fish stores die within six months, not from disease but from starvation and stress in systems that aren’t ready for them. If you’re going to keep a butterflyfish, know which species actually tolerate aquarium life. Klein’s butterfly is my top pick. It’s about as forgiving as this family gets. Everything else on this list requires honest assessment of your experience level before you spend the money.

I’ve kept butterflyfish in my tanks over the years. Raccoon and Copperbands specifically. And while they’re some of the most visually striking fish in the saltwater hobby, they’re genuinely not easy keepers. They’re sensitive, many species will pick at corals, and weaning them onto prepared foods is a real challenge. Honestly, I don’t keep them as often as I used to for those reasons. That said, if you’re set on one, there are species that hold up better than others in the home aquarium. Klein’s butterfly is my top recommendation. It’s about as forgiving as this family gets.

Key Takeaways

Most butterflyfish are corallivores. If you have a reef tank, most of these species will eat your corals. Full stop.
Many species die within months in captivity because they won’t accept prepared foods and slowly starve.
The Copperband is one of the most popular and one of the hardest to feed. It should not be a beginner fish.
Klein’s butterflyfish is the most adaptable species on this list and the safest recommendation for most hobbyists.
Heniochus (bannerfin) is the closest thing to a reef-friendly butterfly, but even this species carries risks with soft corals and LPS.
Butterflyfish belong in fish-only with live rock (FOWLR) systems or large, experienced reef tanks with hobbyists who know the risks.
Buying a butterflyfish as your first or second saltwater fish is a mistake that will likely end badly for the fish.

Avoid Butterflyfish If…

You have a reef tank with SPS, LPS, or soft corals and you’re buying anything other than Heniochus (and even then, with caution)
You don’t have a mature system with stable parameters. New tanks kill these fish fast.
You’re a beginner or intermediate reefer looking for a “showpiece fish.” This family will expose gaps in your husbandry quickly.
You don’t have the time or resources to try multiple feeding strategies to get a stubborn specimen eating prepared foods
You’re buying a Copperband as a pest control solution without a backup feeding plan if it won’t eat

The Hard Truth About Butterflyfish

There are around 130 butterflyfish species spanning 12 genera, and they are arguably the most beautiful family of fish in the marine hobby. They’re also among the most difficult to keep successfully. This combination creates a cycle of impulse purchases, declining fish, and frustrated hobbyists who blame themselves for something that was never going to work in their setup.

Most butterflyfish species are obligate corallivores in the wild. That means they eat coral. Not occasionally. It’s their primary diet. Put one of those species in a reef tank and you will watch it systematically destroy your corals while you struggle to find foods it will accept. Weaning a wild-caught corallivore onto prepared foods takes patience, the right techniques, and sometimes just doesn’t happen at all.

The species in the aquarium trade that survive long-term are the ones with more flexible diets. These are the species worth knowing. The rest are best left on the reef or in expert hands with very specific FOWLR setups designed around them.

ASD Butterflyfish Difficulty Tiers

Most Adaptable (Best for Experienced Hobbyists): Klein’s, Raccoon, Heniochus. These species accept prepared foods most readily, tolerate FOWLR setups well, and have the widest dietary flexibility.

Intermediate (Specialized Care Required): Longnose, Threadfin, Saddleback, Vagabond. Manageable with the right feeding strategy and mature system, but not forgiving of mistakes.

Avoid for Most Hobbyists: Copperband (beautiful but extremely difficult to feed in most systems), Chevron, Ornate, and all obligate corallivores. These species have very high mortality rates in captivity and belong in expert FOWLR systems only, if at all.

The 21 Types of Butterflyfish

For each species, I’ll cover the key stats and the honest reality of keeping it. Not just the scientific name and size, but whether it actually works in a home aquarium and what you’re getting into.

Before you buy: The biggest mistake I see is people buying butterflyfish for a reef tank. Most species will nip at corals, anemones, and other invertebrates. Even so-called “reef safe with caution” species are a real risk with LPS and soft corals. On top of that, many butterflyfish are notoriously sensitive and difficult to wean onto prepared foods. They’re beautiful fish, but they demand more care and the right system.

1. Heniochus (Bannerfin / Wimpelfish)

Scientific Name: Heniochus acuminatus
Common Name: Bannerfin Butterflyfish, Wimpelfish, Longfin Bannerfish
Size: 8 to 10 inches (20 to 25 cm)
Origin: Indo-Pacific
Tank Size: 125 gallons (473 L)
Tank Bred Available: Rarely

The Heniochus is the most adaptable member of the butterflyfish family and the closest thing to a reef-friendly option, with significant caveats. It accepts prepared foods more readily than most species. It will eat mysis shrimp, enriched brine shrimp, and even quality marine pellets once established. It can be kept in some reef tanks, but it may pick at soft corals and certain LPS over time. The larger the system and the more well-fed the fish, the lower that risk.

At up to 10 inches (25 cm) and needing 125 gallons (473 L) minimum, this is not a small-tank fish. Some species can be kept in pairs. If you’re set on a butterflyfish that has a realistic shot at long-term success in a home aquarium, Heniochus is the safest starting point outside of Klein’s.

2. Klein’s Butterflyfish

Scientific Name: Chaetodon kleinii
Common Name: Klein’s Butterflyfish, Blacklip Butterflyfish
Size: 5 to 6 inches (13 to 15 cm)
Origin: Indo-Pacific
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

Mark’s Pick

Klein’s is my top recommendation for any hobbyist who wants a butterflyfish and wants a realistic chance at success. It has the most flexible diet in the family, accepts prepared foods most readily, and does well in FOWLR systems and some mixed reefs. If you’ve been thinking about adding a butterfly to your system, start with Klein’s.

Klein’s is the most beginner-friendly butterflyfish available and the one I recommend to anyone who asks. It’s not the flashiest, but it transitions to prepared foods better than any other species in this family, accepts mysis shrimp and marine pellets readily, and adapts to FOWLR systems without the feeding drama that plagues most other butterflies. At 5 to 6 inches (13 to 15 cm), it fits in a 75-gallon (284 L) system. It is not fully reef safe but is one of the less destructive species when well-fed and given a large enough territory.

3. Raccoon Butterflyfish

Scientific Name: Chaetodon lunula
Common Name: Raccoon Butterflyfish, Moon Butterflyfish
Size: 7 to 8 inches (18 to 20 cm)
Origin: Indo-Pacific, Hawaii
Tank Size: 100 gallons (379 L)
Tank Bred Available: No

The raccoon butterflyfish is identified by the dark mask across its eyes and the bold yellow, white, and black color pattern. It’s one of the more commonly available butterflyfish and one of the more adaptable in terms of diet, accepting a range of invertebrates, tube worms, and over time, prepared meaty foods. I’ve kept this species and it will eat. Getting it onto prepared foods takes some work initially, target-feeding mysis shrimp works well, but once it’s eating it’s a reliable feeder.

It will eat Aiptasia, which some reefers use as justification for putting it in a reef tank. That is not a good enough reason. This species will also eat your other invertebrates and pick at corals. It belongs in a FOWLR system. At 7 to 8 inches (18 to 20 cm), it needs a minimum 100-gallon (379 L) tank and plenty of open swimming space.

4. Copperband Butterflyfish

Scientific Name: Chelmon rostratus
Common Name: Copperband Butterflyfish, Beaked Coralfish
Size: 7 to 8 inches (18 to 20 cm)
Origin: Indo-Pacific
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The Copperband is the most popular butterflyfish in the hobby. It’s also one of the most commonly dead butterflyfish in the hobby. People buy it to control Aiptasia, it refuses to eat anything else, and it slowly starves while they keep trying different foods. This is a predictable outcome that happens over and over.

Getting a Copperband to accept prepared foods is one of the more difficult challenges in marine fishkeeping. Start with live or frozen copepods, then small live brine shrimp, then frozen brine, then mysis shrimp, then anything more substantial. The process can take weeks. Some specimens never get there. Purchasing only from a store that shows you the fish actively eating prepared food before you buy is the only way to significantly improve your odds.

The Copperband requires a mature, stable system. New tanks with swinging parameters will kill it within weeks. A minimum 75-gallon (284 L) is required, and the tank should have been running at least 12 months before adding this species. If your Aiptasia problem requires a solution faster than that, look at peppermint shrimp instead.

5. Longnose Butterflyfish

Scientific Name: Forcipiger flavissimus
Common Name: Longnose Butterflyfish
Size: 6 to 8 inches (15 to 20 cm)
Origin: Indo-Pacific, Red Sea, Eastern Pacific
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The longnose butterflyfish has an extremely elongated snout that it uses to extract prey from crevices in the reef. In the wild it feeds on small crustaceans, polychaete worms, and other small invertebrates hidden deep in the rock. In an aquarium, that specialized feeding behavior means it needs a well-established system with diverse food sources hidden in the rockwork. It will accept small live and frozen foods like copepods and mysis shrimp once acclimated, but it takes patience.

Unlike most butterflies, the longnose has a realistic chance in a mature reef. It tends to leave corals alone and feeds on mobile invertebrates rather than coral tissue. Not fully reef safe, but one of the better options if you want a butterfly in a reef environment. Still not recommended for beginners.

6. Threadfin Butterflyfish

Scientific Name: Chaetodon auriga
Common Name: Threadfin Butterflyfish, Auriga Butterflyfish
Size: 7 to 8 inches (18 to 20 cm)
Origin: Indo-Pacific, Red Sea
Tank Size: 100 gallons (379 L)
Tank Bred Available: No

The threadfin is one of the larger and more commonly available butterflyfish. It gets its name from the extended filament on its dorsal fin. It will eat a range of foods including tube worms, soft coral polyps, and invertebrates, which makes it a poor reef choice. In a FOWLR system it’s a relatively manageable species that accepts prepared meaty foods once acclimated. Target feeding during initial weeks in a quarantine tank makes the transition to prepared foods significantly easier.

7. Saddleback Butterflyfish

Scientific Name: Chaetodon ephippium
Common Name: Saddleback Butterflyfish
Size: 9 to 12 inches (23 to 30 cm)
Origin: Indo-Pacific
Tank Size: 125 gallons (473 L)
Tank Bred Available: No

The saddleback is a stunning species with a distinctive dark saddle patch across its rear body. It’s a large fish that grows up to 12 inches (30 cm) and needs a 125-gallon (473 L) minimum. It eats coral polyps, algae, and various invertebrates. Not reef safe. In a FOWLR setup with an experienced keeper, it’s a manageable species that accepts meaty prepared foods. The size commitment should not be underestimated. This fish needs space, a stable system, and a keeper who understands the commitment involved.

8. Vagabond Butterflyfish

Scientific Name: Chaetodon vagabundus
Common Name: Vagabond Butterflyfish, Crisscross Butterflyfish
Size: 7 to 9 inches (18 to 23 cm)
Origin: Indo-Pacific
Tank Size: 100 gallons (379 L)
Tank Bred Available: No

The vagabond has a distinctive crisscross pattern of diagonal lines across its white body. It’s one of the more adaptable species in the family and transitions to prepared meaty foods more readily than most. In a FOWLR system, it’s a reasonable choice for experienced hobbyists who want a medium-difficulty butterfly. Will eat corals and invertebrates, so reef tanks are not suitable.

9. Redfin Butterflyfish

Scientific Name: Chaetodon lunulatus
Common Name: Redfin Butterflyfish, Oval Butterflyfish
Size: 5 to 6 inches (13 to 15 cm)
Origin: Pacific Ocean
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The redfin is a strikingly colored species with red, yellow, and white patterning. It feeds primarily on coral polyps and is not suitable for reef tanks under any circumstances. In a FOWLR system it can be maintained with prepared meaty foods, but weaning it off its natural corallivore diet requires commitment and consistent target feeding over weeks. Not a beginner fish.

10. Spotfin Butterflyfish

Scientific Name: Chaetodon ocellatus
Common Name: Spotfin Butterflyfish
Size: 7 to 8 inches (18 to 20 cm)
Origin: Atlantic Ocean (Western Atlantic)
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The spotfin is the most common Atlantic butterflyfish and one of the more frequently seen in stores on the eastern United States. It has a white body with a small spot on the dorsal fin and yellow accents. This species eats a wide range of invertebrates and soft coral polyps. Not reef safe. With consistent target feeding of mysis shrimp and other meaty preparations in quarantine, it transitions reasonably well. Best suited to a FOWLR system.

11. Lemon Butterflyfish

Scientific Name: Chaetodon miliaris
Common Name: Lemon Butterflyfish, Milletseed Butterflyfish
Size: 5 to 7 inches (13 to 18 cm)
Origin: Hawaiian Islands
Tank Size: 75 gallons (284 L)
Tank Bred Available: Rarely

The lemon butterflyfish from Hawaii has a bright yellow body covered in rows of small dark spots. It’s one of the more omnivorous butterflyfish species and accepts prepared foods more readily than many. In a FOWLR system, this is among the better long-term choices. It will still pick at certain invertebrates, but its diet flexibility means starvation is less of a concern than with obligate corallivores. Tank-raised specimens occasionally appear in the trade and are significantly easier to work with.

12. Pearlscale Butterflyfish

Scientific Name: Chaetodon xanthurus
Common Name: Pearlscale Butterflyfish, Crosshatch Butterflyfish
Size: 5 to 6 inches (13 to 15 cm)
Origin: Indo-Pacific
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The pearlscale has an orange-red tail and a distinctive crosshatched scale pattern. It feeds primarily on coral polyps and small invertebrates. In a FOWLR system it can be maintained, but it’s one of the pickier eaters in the family and some specimens never transition to prepared foods reliably. Not reef safe. Intermediate difficulty for an experienced keeper with a mature system.

13. Triangular Butterflyfish

Scientific Name: Chaetodon triangulum
Common Name: Triangle Butterflyfish
Size: 5 to 7 inches (13 to 18 cm)
Origin: Indian Ocean
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The triangle butterflyfish is an obligate corallivore. It eats hard coral tissue almost exclusively in the wild and rarely adapts to prepared foods in captivity. This species appears in stores periodically but belongs in an expert setup or not in captivity at all. Its survival in typical home aquariums is poor.

14. Bennett’s Butterflyfish

Scientific Name: Chaetodon bennetti
Common Name: Bennett’s Butterflyfish, Eclipse Butterflyfish
Size: 7 to 8 inches (18 to 20 cm)
Origin: Indo-Pacific
Tank Size: 100 gallons (379 L)
Tank Bred Available: No

Bennett’s butterflyfish is a corallivore that is notoriously difficult to maintain in captivity. It rarely accepts prepared foods and tends to decline in captivity even in expert hands. Its appearance in the trade is unfortunately not matched by its suitability for most hobbyists. Avoid unless you’re running a dedicated, expert-level FOWLR system with live coral feeding options.

15. Panda Butterflyfish

Scientific Name: Chaetodon adiergastos
Common Name: Panda Butterflyfish
Size: 5 to 7 inches (13 to 18 cm)
Origin: Western Pacific
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The panda butterflyfish has a pale grey-white body with dark stripes around the head reminiscent of panda markings. It feeds on coral polyps and polychaete worms. Not reef safe. In a mature FOWLR system with consistent live or frozen food offerings, some specimens adjust. Intermediate difficulty for a dedicated keeper.

16. Tinker’s Butterflyfish

Scientific Name: Chaetodon tinkeri
Common Name: Tinker’s Butterflyfish, Hawaiian Butterflyfish
Size: 5 to 6 inches (13 to 15 cm)
Origin: Hawaiian Islands, Johnston Atoll
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

Tinker’s is a deepwater species rarely seen in the trade. When it is available, it commands premium pricing. It has an unusual two-tone pattern, white on the front and dark on the rear. This species comes from deeper water than most tropical reef fish, which means it prefers cooler temperatures around 72 to 75 degrees Fahrenheit (22 to 24 degrees Celsius). It needs a dedicated, stable system with careful temperature management. A beautiful fish, but requiring significant experience and infrastructure to keep successfully.

17. Multiband Butterflyfish

Scientific Name: Chaetodon multicinctus
Common Name: Multiband Butterflyfish, Pebbled Butterflyfish
Size: 4 to 5 inches (10 to 13 cm)
Origin: Hawaiian Islands
Tank Size: 55 gallons (208 L)
Tank Bred Available: No

The multiband is one of the smaller Hawaiian butterflies with a distinctive peppered pattern. It feeds primarily on coral polyps in the wild and has a poor record in aquarium settings. Experienced Hawaiian reef keepers report occasional success in dedicated systems, but it is not a recommended species for hobbyists outside of expert FOWLR builds.

18. Spot-Nape Butterflyfish

Scientific Name: Chaetodon oxycephalus
Common Name: Spot-Nape Butterflyfish
Size: 7 to 10 inches (18 to 25 cm)
Origin: Indo-Pacific
Tank Size: 125 gallons (473 L)
Tank Bred Available: No

The spot-nape is one of the larger butterflyfish and is characterized by a single black spot on its nape and a yellow-tinged body with vertical brown stripes. This is a corallivore. Not reef safe. At 10 inches (25 cm) fully grown, it needs a very large system. This species is rarely available and belongs only in expert-level setups.

19. Pacific Double-Saddle Butterflyfish

Scientific Name: Chaetodon ulietensis
Common Name: Pacific Double-Saddle Butterflyfish, False Falcula
Size: 5 to 6 inches (13 to 15 cm)
Origin: Pacific Ocean
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The double-saddle has two prominent black saddle patches on its upper body and is sometimes confused with the Falcula butterflyfish. It eats coral polyps in the wild. In aquariums, some specimens make the transition to frozen mysis shrimp and other prepared meaty foods, but success is inconsistent. FOWLR only.

20. Melon Butterflyfish

Scientific Name: Chaetodon trifasciatus
Common Name: Melon Butterflyfish, Redfin Coralfish
Size: 5 to 7 inches (13 to 18 cm)
Origin: Indo-Pacific
Tank Size: 75 gallons (284 L)
Tank Bred Available: No

The melon butterflyfish is a strikingly colored species with pink-red horizontal lines and a vivid yellow dorsal fin edge. It feeds almost exclusively on Acropora coral polyps in the wild and has an extremely poor record in captivity. Even experienced reefers rarely succeed with this species long-term. This is one of the species that should stay in the ocean.

21. Copperband Butterfly (Beaked Coralfish)

Already covered fully in position 4. See the Copperband section above for complete care notes. It’s listed here to acknowledge that many lists include it near the end, but it’s prominent enough to cover fully at the top given how commonly it’s purchased and how often it fails.

Butterflyfish Comparison Table

Species	Size	Min Tank	Reef Safe	Feeding Difficulty	Overall Difficulty
Klein’s	5-6 in (13-15 cm)	75 gal (284 L)	FOWLR only	Easiest	Intermediate
Heniochus	8-10 in (20-25 cm)	125 gal (473 L)	With caution	Easy	Intermediate
Raccoon	7-8 in (18-20 cm)	100 gal (379 L)	No	Moderate	Intermediate
Longnose	6-8 in (15-20 cm)	75 gal (284 L)	With caution	Moderate	Intermediate
Copperband	7-8 in (18-20 cm)	75 gal (284 L)	No	Very Hard	Advanced
Threadfin	7-8 in (18-20 cm)	100 gal (379 L)	No	Moderate	Intermediate
Saddleback	9-12 in (23-30 cm)	125 gal (473 L)	No	Moderate	Intermediate-Adv
Lemon (Hawaii)	5-7 in (13-18 cm)	75 gal (284 L)	FOWLR only	Easy-Mod	Intermediate
Melon / Redfin	5-7 in (13-18 cm)	75 gal (284 L)	No	Expert only	Expert
Bennett’s	7-8 in (18-20 cm)	100 gal (379 L)	No	Expert only	Expert

FAQs

Are any butterflyfish reef safe?

Very few. The Heniochus is the closest to reef safe, but even it may pick at soft corals and LPS over time. The longnose has a better record in mixed reefs than most. Everything else on this list is best kept in a FOWLR system. “Reef safe with caution” in this family means there is a real chance the fish damages your corals. Know that going in.

Why do butterflyfish die so fast in aquariums?

Two main reasons. First, starvation. Most species eat coral polyps or specialized prey in the wild and refuse prepared foods in captivity. Second, stress from inadequate systems. Butterflyfish come from mature, stable reefs. New tanks with fluctuating parameters, insufficient swimming space, or inappropriate tank mates kill them quickly. A butterflyfish that won’t eat in a tank with unstable parameters has almost no chance.

How do I get a Copperband butterflyfish to eat?

Start with live copepods or live brine shrimp to trigger its hunting instinct. Transition to frozen brine, then frozen mysis shrimp, using target feeding with a pipette aimed directly at the fish. Keep the tank dimly lit during feeding. Some specimens take weeks. Some never fully transition. Buying only a fish you see actively eating prepared food at the store is the most reliable shortcut.

What is the best butterflyfish for a beginner?

Honestly, no butterflyfish is a beginner fish. If you’re committed, start with Klein’s in a mature FOWLR system. It’s the most forgiving in terms of feeding and water parameter tolerance. Make sure the tank has been running at least 12 months before adding any butterflyfish.

Can I keep two butterflyfish together?

Some species form natural pairs and can be kept together if introduced simultaneously. Heniochus is commonly kept in pairs. For single-species pairs, introduce them at the same time in a large enough system. Mixing different butterflyfish species in the same tank can work in large systems but increases aggression risk. Never keep two of the same species unless they’re a bonded pair from the same source.

Closing Thoughts

Butterflyfish are some of the most beautiful marine fish in the hobby. They’re also some of the most frequently dead within six months of purchase. That doesn’t have to be the case if you go in prepared, choose the right species, and set up the right system before you buy the fish.

The short version: Klein’s or Heniochus in a mature FOWLR system is a realistic success story. Copperband or any obligate corallivore in a new reef tank is not. The fish pay for the mismatch, not the hobbyist’s enthusiasm.

If you’ve done your research and you’re ready, check availability at Flip Aquatics and Dan’s Fish. Both are reliable sources that can tell you whether a specific specimen is eating before it ships.

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide. Your ultimate resource for marine fish, coral care, reef setup, and more.

November 7, 2023

Can You Eat Goldfish? (Yes You Can And Here’s How)
Can You Eat Goldfish? The quick answer is yes, you can. However, eating your pet goldfish might sound repulsive, but there are some genuine reasons why you should.

Goldfish are a fan favorite in the aquarium hobby, but they also have a huge financial, historical, cultural, and ecological importance. For many, these fish are a domesticated species of wild carp that have made their way into the home aquarium, but some see them as a viable source of food while also controlling invasive populations.

Ever wondered about whether or not you could eat a domesticated goldfish? Keep reading to find out why you should or shouldn’t take a bite of your fishy friend!
Key Takeaways
- Are goldfish edible? Yes, they are as long as they were raised in controlled conditions.
- What do goldfish taste like? Goldfish aren’t the most delicious freshwater fish you can eat, but there are a few reasons why you might change your mind about sampling.
- Goldfish are very invasive and some fisheries have taken advantage of their numbers by selling their harvest to commercial food industries.
- With the right ingredients, goldfish can taste like a muddy white fish.
The History First

Before deciding whether or not to eat your goldfish, it is important to understand where these freshwater fish came from and why.

Domesticated goldfish (Carassius auratus) are the result of thousands of years of selectively breeding various species of wild Asian carp for desired shapes and colors. These wild fish were kept throughout East Asia in sacred ponds for ornamental purposes as well as cultural and spiritual significance as they were thought to bring prosperity and luck.

Eventually, this new fish became popular in other countries, namely Japan, where the desired traits were bred out even further to create some of the vibrant colors and unique shapes we have today. As the popularity of goldfish increased, European nobility adopted pet goldfish and eventually exported them to North America.

Towards the 1800s, pet goldfish popularity exploded. This gave way to the many popular breeds we have today, but it also helped contribute to the exponential release and rise of goldfish as an invasive species to natural waterways.

Culinary Usage

While goldfish have mostly been seen as pets, close carp relatives have always been on the menu.

Just like goldfish, carp were domesticated for consumption. The harvesting of carp can be dated back to early Chinese and Roman history. Dishes and methods of preparation undoubtedly spread across the world, though they were especially popular in rural areas.

During the early 1900s, goldfish swallowing became a fun party trick fo college students in universities; the challenge was to swallow a live goldfish whole. This tradition of swallowing goldfish still lives among some campuses but has raised questions of ethics and safety. It’s also a very popular dare or bar trick done in colleges (most notably Matt Schulien⁴).

The most-publicized college fad in history started on March 3, 1939, in the Harvard Union, when freshman Lothrop Withington, Jr., ’42, goaded by a bet with his roomates, downed a goldfish never to be upped again. Pocketing a wager of $10 in good 1939 currency for his efforts, the Yardling thus ushered in a two-month period, which “Time Magazine called “among the maddest in the annals of U.S. Undergraduates.”
Source – The Harvard Crimson

Today, carp fisheries are still in business, and dishes, like the Japanese nishikigoi nabe–a koi hot pot–are still popular. In fact, Lake Eerie, Michigan is one of the biggest producers of goldfish and carp meat, which has proven to be a very lucrative bycatch from local fisheries. The practice is starting to pickup in the United States:

In 2015, Michigan and Ohio commercial fishermen netted 113,800 pounds of goldfish in western Lake Erie, the only Great Lake that yields enough to market. Michigan waters produced about 78 percent of that catch, or 88,791 pounds.
Source – MLive

But can you eat goldfish?

The answer is yes, you can eat goldfish. There are actually a few good reasons why you should try eating goldfish, but also a few counterarguments as to why these fish should stay pets.

Reasons For

What makes goldfish different from any other freshwater fish? Anatomically, not much. This means that they’re technically edible and safe to eat as long as they’ve been raised in healthy conditions. While disease and illness are a real concern, whether or not to eat goldfish is largely a question of ethics.

If you need help feeling better about choosing to eat a goldfish, though, here are a few reasons why you might take the chance.

Controlling Populations

The main reason to eat a goldfish is to control wild populations. Goldfish are one of the most invasive species of fish on all continents apart from Antarctica¹. These fish reproduce quickly and adapt to imperfect conditions. On top of this, goldfish are regularly added to ponds and rivers by unprepared fish owners. This leads to them quickly outcompeting other native species.

Reproduction

During the peak spawning seasons, goldfish can reproduce almost every 3 weeks. These egg clutches can be anywhere from a few hundred fish to several thousand, depending on the maturity and health of the goldfish. While not all fry survive, many new goldfish enter the ecosystem and take away resources from other species.

Habitat Destruction

If you’ve ever kept a goldfish in an aquarium before, you’ll know that they’re very messy fish. Not only do these fish eat a lot and create a ton of waste in return, but they like to rummage through the substrate and uproot plants and decorations.

Wild goldfish demonstrate these same behaviors. They are ravenous fish that will clear a habitat of its natural resources. In the beginning, this was used as a benefit as goldfish helped eliminate algae from waterways. However, as the fish processed the foods and created waste, they would actually increase the amount of nutrients and subsequent algae in the water.

Not only do invasive goldfish outcompete other species by taking resources, but they also change the makeup of the entire environment.

Hardiness And Adapting

Goldfish are also incredibly hardy and adapting. These fish are a coldwater species that can survive a wide range of temperatures. They are also very prepared to hibernate over long, cold winters. While goldfish will still succumb to high levels of ammonia, nitrite, and nitrate, they are much more hardy than other fish species that might be present.

While it might not seem like a significant amount at the local scale, hundreds if not thousands of ornamental goldfish are released in the wild every year around the world². This leads to goldfish populations establishing in new ecosystems while also resupplying and adding to already existing ones.

Both these factors, in addition to hobbyist releases, lead to exponential growth in populations. Many ecosystems lack a natural goldfish predator, and so populations are left uncontrolled.

As mentioned before, some fisheries have started harvesting wild goldfish for commercial purposes, but recreational fishermen are also encouraged to try eating wild goldfish they may catch. The hope is that eating goldfish becomes as normalized as eating other freshwater fish species.

Normalizing Eating Goldfish

Another reason to eat goldfish is because there aren’t very many reasons not to if you’re careful. If you consider a goldfish like any other kind of fish species, then there are few differences. The main difference is that some goldfish are raised to be pets while other fish are raised to be food.

The truth is that eating wild carp and goldfish is a cultural norm in some places. Expanding your appetite also helps support goldfish farming and carp fisheries that would otherwise lose profit to unusable bycatch.

Reasons Against

Can you eat goldfish? Yes. But justifying humans eating goldfish is another story.

There are several reasons why you shouldn’t eat goldfish, including taste and proportion, disease and illness, and ethics. Not only are these fish members of the family, but they can also cause problems if not harvested correctly.

Taste And Proportion

One of the main reasons to not eat goldfish is due to their taste. While I’ve never personally tried these fish, I’ve heard goldfish taste similar to the worst parts of a muddy catfish, no matter how much seasoning you use.

This makes sense, though. Members of the carp family are largely bottom-dwelling fish that eat a variety of vegetation, insects, and, sometimes, garbage. These are scavenging fish that will dig through the dirt for food and will likely end up eating some of that dirt along the way, resulting in a muddy taste. Raw fillets are also very smelly, and the smell does not fade even when you cook goldfish.

Not only do goldfish taste muddy, but they’re also very bony fish. These fish vary greatly in size from one individual to the next, meaning that bones can be big or small. Even then, small bones are difficult to remove and often not worth the time of removing. Because of this, it’s often recommended to cook goldfish in a stew or soup to extract the flavor and easily remove the meat. It is safe to say goldfish raw dishes don’t exist and don’t expect goldfish sushi!

Another aspect to consider is that goldfish have very little meat. Even though these fish can surpass a foot in length, the fillets cut are still very small. This, in addition to the muddy taste, smell, and many bones, makes eating a goldfish more work than it’s worth.

However, the cooking process has a lot to do with whether goldfish taste good or bad. As mentioned before, many cultures eat and enjoy goldfish as a food source.

Disease And Illness

One of the main concerns about eating a domesticated or feral goldfish is disease and illness. Like other fish, goldfish carry harmful parasites, diseases, and illnesses – especially if you purchase feeder fish. There is also a risk of salmonella from eating fish from your fish tanks.

If you decide to eat domesticated or wild goldfish, then it definitely shouldn’t be eaten raw. This is because goldfish are known to carry a specific disease, known as fish tuberculosis, caused by a harmful bacteria, Mycobacteriosis spp..³ This can be transferred to humans and cause many complications.

Like other freshwater species, goldfish can also carry harmful parasites. Various worms and parasitic microorganisms are common in wild animals but are also likely to be found in the home aquarium. Consider all the possible illnesses ornamental aquarium species carry, like ich, velvet, and dropsy. All of these conditions can be found dormant or active in goldfish.

As mentioned before, it is also possible that goldfish living in a backyard pond or other outside ecosystem can ingest garbage.

It’s important to keep in mind that almost every fish harvested for commercial foods contains parasites. However, many fish are treated with antibiotics to prevent breakouts.

Ethics

The main reason why people don’t eat live goldfish is largely due to ethics. Whether you win your fish at a fair, catch it in a lake, or buy one from the pet store, these fish were bred to be pets. For too long, these fish were sold with the intent of being kept in a controlled environment. While they can survive and withstand harsher conditions in the wild, this is often seen as inhumane and irresponsible by most fishkeepers.

It’s hard to think about eating a pet, and many fish owners would not even have the thought cross their mind. It is important to understand why some communities may rely on live goldfish as a food source and how their consumption could create a positive impact.

Laws

Even if you wanted to eat a goldfish, it might be illegal where you live. Several countries have laws surrounding animal preparation and consumption, including that of goldfish. Even more countries have strict regulations surrounding catching and harvesting both freshwater and marine life.

If you do intend to eat goldfish, then always check with local laws and regulations.

Bonus – Where To Learn How To Cook Them

Okay so you weighed the options and are curious now. Where do you learn how to cook them? I’ll provide two sources for you. One is by Village Food Village and the other is from the MeatEater. Since I know several readers will be shocked seeing fish that look like their pets get cooked and eaten, I’ll leave you to clicking the links to see the video.

FAQs

Are goldfish good eating?

No, goldfish are not usually good to eat unless the person has been acclimated to the taste. Most foreign goldfish consumers agree that goldfish taste bad. They say they taste like the worst parts of freshwater catfish, with tons of bones and a very fishy smell and taste that does not go away when cooked!

How many edible goldfish should you eat?

I cannot tell you how many goldfish you should eat. There are many factors surrounding the quality of goldfish at hand, including if they had access to healthy vegetation and a controlled environment as well as if they’ve been treated for diseases, like intestinal worms.

Are goldfish and koi the same?

No, goldfish and koi are not the same. Scientifically, goldfish are Carassius auratus, while koi are Cyprinus rubrofuscus. Both these fish share common ancestors, but koi are much larger fish.

Like goldfish, koi were historically raised for commercial food and are still part of some common dishes throughout Asia. Most people say koi fish taste like oily and muddy white fish.

Are goldfish edible?

Yes, goldfish is safe to eat as long as the fish was raised in safe conditions. There are no anatomical features that would make a goldfish inedible, though don’t expect the meat to taste good!

Do Chinese cultures eat goldfish?

Yes, Chinese cultures have and do eat goldfish. More often, carp is more heavily farmed and processed than goldfish, but they are still sometimes eaten in more rural regions.

Do adults eat goldfish?

Yes, adults can eat goldfish. In fact, eating a goldfish is not limited to any age or culture as long as the fish has been fully treated and cooked.

Are wild goldfish good to eat?

Most consumers agree that goldfish taste like the bottom of the ponds they’re found in. However, there are many ways to prepare a goldfish dish so that they take on the desired flavors of the given spices and ingredients. For example, many cultures use goldfish and carp for soups and broths.

References
- https://www.sciencedirect.com/science/article/abs/pii/004484869400227F
- https://www.mlive.com/news/2016/04/great_lakes_goldfish.html
Final Thoughts

Are goldfish edible? Yes. What do goldfish taste like? Well, not the best.

Goldfish have a long history of being beloved pets in the aquarium hobby. These fish were bred over thousands of years for the best colors and patterns, and they largely rely on humans for their livelihood. However, exploding populations and normalized bycatch may just make these fish the next most popular dinner platter.

As long as the goldfish are carefully curated for human consumption, then there is no reason they can’t be eaten. If you’re worried about taste, disease and illness, or just can’t seem to eat your scaly friend, then they still make fantastic pets.

📘 Want to learn more? This article is part of our complete Freshwater Fish Guide. your ultimate resource for freshwater species, care tips, tank setup, and more.
November 3, 2023

Keyhole Cichlid Care Guide: The Most Underrated Dwarf Cichlid in the Hobby

Hard Rule

Keyhole cichlids are too timid for tanks with aggressive or fast-moving species. They will stop eating and waste away if kept with tiger barbs, large danios, or other active species that outcompete them. Peaceful tank mates only.

Species Overview
Classification
Understanding Them
Compatible Tank Mates
Feeding And Nutrition
Breeding Keyhole Cichlids
Health And Disease Prevention
Frequently Asked Questions
What It Is Actually Like Living With Keyhole Cichlid
Closing Thoughts

Keyhole cichlids are the most peaceful cichlid in the hobby, and that is exactly why most people fail with them. They get bullied by aggressive tank mates, stressed by fast moving fish, and fade into the background of busy tanks. This fish needs calm, not chaos. I have kept keyholes for years and the biggest mistake is putting them with fish that treat their timidity as an invitation to harass. Get the tank mates right and this fish is a gem. Get them wrong and it hides until it dies. The cichlid that hides behind a leaf when a tetra swims by.

The cichlid that hides behind a leaf when a tetra swims by.

What Most Care Guides Get Wrong About Keyhole Cichlid

The keyhole cichlid is criminally underrated, and the main misconception is that they’re boring. Most people see them in a store tank where they’re washed out, stressed, and hiding, and they pass them by. But in a well-planted tank with proper care, keyhole cichlids develop beautiful gold and cream coloring, and their behavior is endlessly interesting. They’re also the most peaceful cichlid I’ve ever kept. And I mean genuinely peaceful, not “peaceful for a cichlid.” They won’t bother shrimp, they won’t harass other fish, and they won’t destroy your plants. The other myth is that they don’t have personality. Keyholes are shy initially, but once settled in, they become curious, interactive fish that recognize their keepers.

The Reality of Keeping Keyhole Cichlid

Keyholes are genuinely gentle fish, and that gentleness defines everything about how you need to keep them.

They are extremely shy. New keyhole cichlids hide for days or weeks. This is normal and you cannot rush it. Forcing them into the open by removing hiding spots will stress them further. Give them caves, plants, and time.

They cannot handle aggression. Even mildly aggressive tank mates like tiger barbs or some tetras will stress keyholes into declining health. They need tank mates that are genuinely peaceful and non-confrontational.

They color up slowly. Keyholes are not flashy fish when you first get them. The colors develop gradually as they settle in and feel secure. A keyhole that has been in your tank for six months looks completely different from one you just brought home.

They are underrated. Keyholes are one of the most overlooked cichlids in the hobby because they are not aggressive or flashy. But their personality, hardiness, and community compatibility make them excellent fish for the right keeper.

Biggest Mistake New Keyhole Cichlid Owners Make

Keeping them with aggressive or even semi-aggressive tank mates. Keyholes are not equipped to handle confrontation. They shut down, stop eating, and waste away. Choose only the most peaceful community fish as companions.

Expert Take (Mark Valderrama, AquariumStoreDepot)

A pair of keyhole cichlids in a heavily planted 30 gallon with corydoras and small tetras is one of the most peaceful, attractive cichlid setups you can build. If you want cichlid behavior without cichlid aggression, this is your fish.

Key Takeaways

Keyhole Cichlids are sociable, adaptable freshwater fish that can live up to 10 years with proper care.
Create an ideal tank setup by mimicking their natural habitat and providing plenty of cover, such as plants and caves.
These fish prefer calmer waters and an acidic pH
Choose compatible tank mates like corydoras catfish, larger tetras, and angelfish

ASD Difficulty Rating: Tier 1/2 – Beginner-Intermediate

Keyhole cichlids (Cleithracara maronii) are exceptionally peaceful cichlids suitable for community tanks with other gentle species. They are shy, non-digging, and one of the most community-compatible cichlids available.

Species Overview

Scientific Name	Cleithracara maronii
Common Names	Keyhole Cichlid
Family	Cichlidae
Origin	South America, primarily in slow-moving waters of the Orinoco River basin
Diet	Omnivore
Care Level	Easy to Intermediate
Activity	Slow to Moderate
Lifespan	Up to 10 years
Temperament	Peaceful (Mildly aggressive when breeding)
Tank Level	Middle to bottom
Minimum Tank Size	20 gallon (long format) otherwise, 30+ gallons
Water Temperature Range	74°-80°F
Water Hardness	5 to 20 DH
pH Range	5.0. 7.0
Filtration / Water Movement	Low
Water Type	Freshwater
Breeding	Egg layer
Difficulty to Breed	Easy to breed
Compatibility	Community fish
OK, for Planted Tanks?	Yes

Classification

Order	Cichliformes
Family	Cichlidae
Subfamily	Cichlinae
Genus	Cleithracara
Species	C. Maronii (Steindachner, 1881)

Understanding Them

Keyhole Cichlids are native to the clear coastal creeks and river basins of South America and make great additions to community tanks for all levels of fish keepers. Slow moving water, rich in decaying wood, is what these freshwater creatures prefer along with their regular diet consisting of worms, crustaceans and insects.

🏆 Mark’s Take: From what I’ve heard consistently from fish store colleagues who’ve worked with them. Keyhole Cichlids are one of the most genuinely chill cichlids you can add to a community tank. They don’t carry the popularity of rams or apistogrammas, which is honestly a shame, because they’re easier to keep than either. If you want a cichlid that won’t demolish a planted community setup and gives you minimal stress, this fish deserves to be at the top of your list.

What sets them apart from others is that they can change their coloring pattern depending on threats, which makes them even more appealing! This characteristic of this fish has lead to get the nickname “chamelon cichlid.”

Fun Fact: The Keyhole Cichlid was named one of the forgotten cichlids per Tropical Fish Hobbyist Magazine.

As well as being peaceful by nature, Keyholes also like company so having multiple males or females together. They may have to bicker a little to establish their pecking order, but once they do that they should become peaceful among each other. However, one a breeding pair occurs, more aggression may occur.

Origin And Distribution

Keyhole Cichlids (Cleithracara maronii) have a wide distribution across various coastal regions, including Suriname, French Guiana, Venezuela and Guyana, as well as Trinidad & Tobago. These hardy aquarium fish need plenty of space to thrive. They inhabit small creeks and rivers, which offer the perfect habitat for young fish along with other smaller species.

Average Size

Considering their eventual adult size of 4 to 4.9 inches (10-12.5 cm), it is important for any aquarist to account for an appropriate tank space when setting up a home environment for keyhole cichlids, as they still need adequate room. They will technically qualify as dwarf cichlids to hobbyists and is kept in tanks as small as 20 gallons if the long configuration is used. Fortunately for you, this cichlid species grows slower than most.

⚠️ Size Warning: The label ‘dwarf cichlid’ is misleading here. At 4 to nearly 5 inches, Keyhole Cichlids are on the larger end of what most people expect from a dwarf species. That surprises keepers who assumed they’d stay small like an apistogramma or a pea puffer. This is one of the main reasons hobbyists feel the fish outgrew their plans. A 30-gallon minimum is a much more realistic starting point than the bare minimums you’ll sometimes see listed.

Appearance

Keyhole Cichlids, compared to other dwarf cichlid species, will seem dull in appearance with their muted colors. The body is round and compressed with muted colors that allow it to blend into the surroundings when needed, while there’s a black stripe above the eye, which contrasts effectively against this subtle coloration. The fish will become more yellow with its body color over time as it ages.

Keyholes possess an unmistakable key shaped mark on their head, giving rise to its common name. During mating season, male and female specimens become even more attractive due to changes in color. Males turning white while females take on the black bar design resulting from where they got their title of ‘keyhole cichlid.’ Adding both genders of this fish species is truly captivating for any home aquarium setup making it stand out amongst other similar types of fish.

Males are larger than females while sporting longer dorsal fins compared with a female’s rounder shaped ones. Both sexes hold equal beauty making it difficult not love this unique species!

Lifespan

When taken care of correctly, Keyhole Cichlids can live for 7-10 years in aquariums. This is quite a lengthy lifespan which makes them good companions to fish lovers who are looking for longterm enjoyment as well as educational opportunities.

To maximize the health and lifespan of these cichlids, it’s essential that their environment remains stable with optimal water parameters and few stress factors present.

Ideal Tank Setup For Keyhole Cichlids

Keyhold cichlids will need a tank at minimum of 20 gallons. However, the tall style 20 gallon will not work at this size. You will need at least a 20 gallon tank so you have enough hortizontial space so the fish will not become overly territorial.

Aqueon 20 Gallon Tank

A classic 20 gallon aquarium in its 30 inch long variant. A very popular aquarium.

Buy On Petco Buy On Amazon

Substrate And Decorations

On top of this basic setup, cover like plants or caves are essential if they want these species feeling safe, so adding decoration such as driftwood, rocks, & aquatic plants will help recreate a more organic environment similar to their native habitats, make sure not pick bright lighting nor aggressive neighbors which can easily upset them.

Fine grained substrates such as soft sand should be used to replicate their natural setting. Decorations, including driftwood and rocks, can add even more visual appeal, plus provide safe hiding spots in the tank.

This is an excellent cichlid species for a planted tank. They will not eat plants or dig them up. They will also get along with most community fish as long as you don’t keep them with smaller fish that they can fit their mouths. If you want to replicate their natural environment Cabomba or floating varieties are best for them. Heavily planted tanks are encouraged as these are known for being shy fish.

Cabomba Aquatica

One of the easier Cabomba plant types available that is suitable for beginners. Can be grown submersed or emersed

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Is the Keyhole Cichlid Right for You?

Before you commit to this species, here’s an honest assessment of whether it fits your setup and experience level.

The most peaceful cichlid in the hobby. If you want cichlid personality without any aggression whatsoever, this is your fish.
Excellent for planted community tanks. Won’t uproot plants, won’t eat shrimp, won’t bully tank mates.
Need patience. They’re shy for the first few weeks and need time to settle in before showing their personality.
Not a flashy fish. Their beauty is subtle. Cream and gold tones with the distinctive keyhole marking. If you want bright colors, look elsewhere.
Hardy and forgiving. Tolerant of a range of water conditions and very disease-resistant once established.
Best in groups or pairs. They’re social fish that do better with conspecifics than as singles.

Water Parameters

For your Keyhole Cichlids to stay healthy and happy, it is important to adhere to the required water parameters. The pH should be from 5.0 – 7.0 while they should have a stable temperature of 74-80°F. These fish prefer softer water as well.

Given their higher temperature requirements, they are based setup with a reliable aquarium heater to keep the temperatures stable. In addition, you should also maintain the following nutrient parameters:

Ammonia – 0 PPM
Nitrite – 0 PPM
Nitrate – 40 PPM

Filtration And Water Flow

Creating a healthy environment for Keyhole Cichlids necessitates the need for efficient filtration, although their response to strong currents is negative. Many power filters and canister filters will be too strong for them and planted aquariums require water that is not compatible with their preference.

To mitigate this, consider keeping a heavily planted tank that will have pockets of lower water flow where your fish can feel safe. Note their colors when they are swimming, if they start to display more black marks on their body, this is a result of their reaction to stress around them. This is sometimes your first warning sign that something is amiss with their environment.

For canister filters, you can use a spray bar attachment to lessen the flow into the tank. The fish is large enough to not get sucked up by intakes, but it is the output speed that will stress them out. Others will use sponge filters, don’t I’m not a fan as I prefer to hide as much equipment as possible in my setups.

Compatible Tank Mates

Being a medium sized fish with a docile demeanor, there is a large amount of potential keyhole cichlid tank mates you can add with your Keyhole Cichlid. Possible tankmates include:

Larger Tetras
Cory catfish
Angelfish

In addition, you can also consider other cichlids such as:

Geophages
Severums

For these fish, make sure they are either smaller or near the same size as your Keyhole cichlid when they are first introduced.

Lastly, due to these fish being naturally shy, it’s could help bring them out if you add dither fish in the tank. Look for dithers that are at least 2.5 inches long to prevent them from getting eaten.

Bad Tankmates

Avoid the following fish as they will be hostile to your Keyhole Cichlid:

Jack Dempsey
Red Terror
Green Terror
Oscars
Jaguar Cichlid

There are a few fish I’ll include here as maybe. Sometimes they work, and other times they don’t. It’s up to you if you want to consider them. Just have a backup plan if it doesn’t work out:

Firemouth cichlid
Convict cichlid

Feeding And Nutrition

Keyhole Cichlids are omnivores and need a diverse diet consisting of both plant and animal based proteins. This mimics their natural habitat, where the primary sources of food are detritus, larvae, as well as small crustaceans such as shrimp.

To deliver that nutrition to them, provide them with varied dry foods like flakes or pellets alongside live insects and frozen items on occasion, all while making sure not to overfeed by monitoring portion size, as food fed should be consumed within two minutes. Ron’s Cichlid food is a great brand of food to use for these fish to ensure they get a good mix of ingredients.

Great Balanced Food

Ron's Cichlid Food

Ron is an African Cichlid breeder with over 25 years in experience who created a line of food that is well balanced. A great option when you can’t use frozen foods.

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Breeding Keyhole Cichlids

Breeding Keyhole Cichlids is relatively straightforward since they form pairs and bond for life as monogamous substrate spawners. To raise their success rate, providing an optimal breeding tank with the right water parameters combined with a diet containing live or frozen foods is key having a successful breeding spawn.

Female keyhole cichlids can lay up to 600 eggs at a time and both parents will actively care for their young. These eggs is laid on rocks, driftwood, plants, and even on the aquarium glass itself! A spawning site is recommended to create for them. You use flat pieces of rock, wood, or even title or pots so the fish have something to lay their eggs on.

Parental Care And Fry Development

One of the more noteworthy characteristics of Keyhole Cichlid breeding is that both male and female fish put forth exceptional efforts when it comes to caring for their eggs and larvae. The parents actively protect them from danger, seeing to it they remain safe until hatching occurs (video source).

While these fish will get more aggressive when breeding, they are not as bad as other cichlids. They will often push away a threat versus damaging or attacking tank mates. Even so, to keep fry from being eaten by other tankmates, consider moving the parents to their own breeding tank.

Once hatched, parental care will continue often lasting a few months, as they feed small organisms like infusoria or newly born brine shrimp on behalf of their fry. It is one of the most rewarding things to take part in the hobby.

Health And Disease Prevention

To properly care for Keyhole Cichlids, stay on top of water quality parameters. Some common diseases you may come across are:

Ich
Velvet
Flukes

Less common ailments include infections like fin rot and columnaris.

Quarantining is your best method of prevent, though I know most hobbyist will not practice this. In the even you do not practice quarantine, keep your tank as stable and stress free as possible.

Frequently Asked Questions

What do keyhole cichlids eat?

Keyhole cichlids are omnivorous, and will eat a variety of food items such as small crustaceans, insects, larvae, worms or small fish. These fish also enjoy eating plant matter. To flakes and pellets that can be bought from the store. Frozen options are great too!

What color are keyhole cichlids?

Keyhole cichlids display a yellow-cream color, but when the fish is stressed it can change to brown. An identifiable feature of these species is their black spot situated at its center that looks like a keyhole.

What cichlids are nice?

Beginners looking for an easy, peaceful fish can find the keyhole cichlid to be a great option. Not needing much space and having hardiness on its side makes it simple to keep this species in aquariums.

What size tank do Keyhole Cichlids need?

Keyhole Cichlids require at least a 20 gallon tank long. If you do not have a long tank, then a 30 gallon would be the minimum tank size.

Are Keyhole Cichlids compatible with other fish species?

Keyhole Cichlids are harmonious with other aquatic life like larger tetras, peaceful barbs, and corydoras. As long as the fish won’t fit in its mouth and it’s hostile, your Keyhole should get along with them.

South American Cichlid Species Directory

This article is part of our South American Cichlids: Complete A-Z Species Directory. Visit the hub page to explore care guides for all 32 South American cichlid species we cover.

What It Is Actually Like Living With Keyhole Cichlid

This is the part no other care guide gives you. Forget water parameters for a minute. Here is what it is actually like to share your tank with this species.

They change color with mood. Keyholes shift between pale cream and dark brown depending on their mood. The keyhole-shaped marking on their side becomes more or less prominent. Reading their color is like reading their emotions.

They are gentle parents. Keyhole cichlids are attentive parents, but even their parental aggression is mild by cichlid standards. They escort fry around the tank without the violent territory defense you see in other species.

They thrive in planted tanks. Unlike many cichlids, keyholes leave plants alone. They do not dig, uproot, or eat plants. A densely planted tank is their ideal habitat.

They are slow eaters. Keyholes take their time with food. In a tank with fast, aggressive eaters, they get outcompeted and go hungry. Make sure food reaches them during feeding time.

How the Keyhole Cichlid Compares to Similar Species

The Bolivian ram is the closest comparison. Both are hardy, peaceful South American dwarf cichlids. Bolivian rams are more colorful and slightly more assertive during breeding. Keyhole cichlids are calmer and even more community-compatible. If you want a dwarf cichlid that will absolutely never cause problems in a community tank, the keyhole wins. If you want more color and don’t mind mild breeding aggression, the Bolivian ram is the better pick.

The festivum cichlid is another overlooked South American cichlid worth comparing. Festivums are larger (reaching 6-8 inches) and need more space, but they share the keyhole’s gentle temperament. Both are peaceful enough for community tanks with smaller fish, which is unusual for cichlids of their respective sizes. If you have a larger tank and want a similarly gentle cichlid with more physical presence, the festivum is an excellent option.

Closing Thoughts

Keyhole cichlids are proof that the quietest fish in the room still needs the right room.

Fish keepers of all levels can have a rewarding experience with the Keyhole Cichlids, thanks to their remarkable adaptability and peaceful disposition. If you want to create an environment in which these fish thrive, make sure that your tank is set up according to its natural habitat as well as providing adequate care for them.

Have you kept this fish before? Let us know your experience in the comments below. I love to hear back from my readers. Until next time!

November 1, 2023

25+ Fish With Black Stripes: My Picks From Years at the Fish Store
Striped fish make up some of the most recognizable species in the hobby. and a lot of them were regulars at the fish store where I worked for years. Angelfish, zebra danios, black neon tetras. these are fish I cared for, sold, and fielded questions about constantly. What strikes me about this group is just how diverse it is beneath the stripe pattern: some are peaceful schoolers that belong in groups, some are territorial cichlids that need space, and some get significantly larger than people expect from the display tank. This guide covers 25+ of the best, across both freshwater and saltwater.
Key Takeaways
- Stripes are just one of the many color patterns freshwater and saltwater fish use to help survive in the wild.
- Fish with stripes can be black and white or feature other natural and vibrant colors, depending on the species.
- Freshwater and saltwater fish should not be chosen on appearance alone, so make sure to research all the necessary care requirements before bringing home a new addition to your aquarium!
Why Do They Have Them?

Have you ever thought about why animals look the way they do? Animals, including fish, have evolved for millions of years to develop colors and patterns that not only keep them alive but also provide the best success for passing down their genes. This is a phenomenon known as natural selection, where evolutions determine the species’ success, meaning the most opportunistic and successful traits get passed down from one generation to the next.

All this is to say that at one point in evolutionary history, stripes helped the given species survive better.

There are several reasons why fish might have evolved stripes. The first reason is that stripes aid in camouflage. Stripes break up the shape of an otherwise solid colored fish, which can make them nearly invisible to predators. Other stripes can also mimic the environment of the fish, especially if plants or coral are abundant.

Another use of stripes is for communication. This aspect is less understood, but it’s believed that fish can convey aggression, submission, or physical fitness for reproduction. In some cases, fish mimic the stripe patterns of other poisonous or venomous species to scare off potential predators, even if that specific species is harmless.

Lastly, stripes may be selectively bred within the aquarium hobby. Many species, especially freshwater fish, have been modified to express the best colors and patterns. As a result, some fish may display nearly every color and pattern combination imaginable.

Fish With Black Stripes

Here are some of the most popular freshwater and saltwater fish with stripes for the home aquarium!

⚠️ Before You Buy: The biggest mistake I see is people shopping purely based on looks. a striped fish catches their eye and they grab it without checking compatibility, adult size, or whether the species needs a group. Tiger Barbs are notorious fin nippers in the wrong setup. Clown Loaches look small in the store but grow to 12 inches. Many tetras and danios are social fish that are stressed and dull-colored alone. they need 6 or more to thrive. Always research the fish, not just the stripe.

1. Zebra Angelfish
- Scientific Name: Pterophyllum scalare
- Common Names: Zebra angelfish, Silver zebra angel
- Minimum Tank Size: 30 gallons
- Adult Size: 6 inches
- Temperament: Semi-aggressive
- Care Level: Easy
- Diet: Omnivore
- Origin: Selectively bred
- Temperature: 75-82° F
- Swimming Level: Middle
Zebra angels are a selectively bred type of freshwater angelfish cichlid, Pterophyllum scalare. These fish have the same care requirements as other varieties of this species but feature a perfectly curated appearance.

The zebra angel is silver with three to five black stripes that run from the dorsal fin to the stomach. These strips are usually solid but might have a misbar, or not-fully-connected, appearance. One special feature about these fish is that a stripe usually runs vertically through the eye, letting the pupil look like a part of the stripe.

2. Zebra Pleco
- Scientific Name: Hypancistrus zebra
- Common Names: Zebra pleco, Zebra altimira pleco, L-46
- Minimum Tank Size: 30 gallons
- Adult Size: 3-4 inches
- Temperament: Peaceful
- Care Level: Moderate
- Diet: Omnivore
- Origin: Brazil
- Temperature: 79-86° F
- Swimming Level: Bottom
The zebra pleco is one of the most sought-after species of pleco, and their price tag reflects that. These are extremely unique fish with a pure white base with black stripes across the face, body, and fins.

Though beautiful, this black-striped fish is nocturnal and might stay in the shady areas of the tank throughout the day. The zebra pleco is omnivorous and requires a diet of plant and protein-based foods, though they will not chew on driftwood, unlike other species of pleco.

3. Skunk Cory

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- Scientific Name: Corydoras aracuatus
- Common Names: Skunk cory, Sands’ cory
- Minimum Tank Size: 20 gallons
- Adult Size: 2-3 inches
- Temperament: Peaceful
- Care Level: Moderate
- Diet: Omnivore
- Origin: Brazil
- Temperature: 68-77° F
- Swimming Level: Bottom
The skunk cory is one of the lesser common species of Corydoras available in the aquarium hobby, possibly due to its oversimplicity. That isn’t to say that these aren’t great nano fish to keep though!

The skunk cory is named after the singular thin black stripe that runs along either side of the dorsal fin from the head to the end of the tail fin. The rest of the body is a light brown or grey color.

Skunk cories are relatively easy to keep, like other species of cory. They are small, somewhat shy fish that do best with a soft substrate, plenty of hiding spots, and a school of at least 6 or more.

4. Frontosa Cichlid
- Scientific Name: Cyphotilapia frontosa
- Common Names: Frontosa cichlid, Front cichlid
- Minimum Tank Size: 150+ gallons
- Adult Size: 1.0-1.5 feet
- Temperament: Semi-aggressive
- Care Level: Moderate
- Diet: Carnivore
- Origin: Lake Tanganyika, Africa
- Temperature: 72-82° F
- Swimming Level: Middle to Bottom
The frontosa cichlid is a large African cichlid that is relatively difficult to keep due to its potential adult size. These are large fish that need to be kept with other fish that are also endemic to Lake Tanganyika as pH needs to be higher, between 7.5 and 9.0.

Frontosa cichlids are labeled as semi-aggressive but are more defensive of their territories than being openly aggressive to each other. It should be noted that these carnivorous fish can eat small fish once they reach larger sizes.

These cichlids vary in appearance, especially if wild-caught from different locations within the lake. In general, frontosas feature five to seven broad black bands on top of a light or pale blue color.

5. Tiger Barb
- Scientific Name: Puntius tetrazona
- Common Names: Tiger barb, Sumatra barb
- Minimum Tank Size: 30 gallons
- Adult Size: 2-4 inches
- Temperament: Semi-aggressive
- Care Level: Moderate
- Diet: Omnivore
- Origin: Sumatra and Borneo
- Temperature: 74-79° F
- Swimming Level: Middle
For years, the tiger barb was one of the most popular freshwater fish available in the aquarium trade. These fish are honey-brown with red fins and four black stripes. These fish might look like a species of tetra, but they are semi-aggressive fish that can fin nip and attack other more peaceful species.

A loose schooling fish, tiger barbs must be kept in groups of at least 6 or more. These are active fish that will move together throughout the tank looking for food or possibly to terrorize other fish.

True tiger barbs are naturally colored. However, these fish have been genetically modified to exhibit bright colors by GloFish, like neon yellow, pink, and green. Some barbs keep their stripes while others are solid colors.

6. Zebra Danio
- Scientific Name: Danio rerio
- Common Names: Zebra danio, Zebrafish, Striped danio
- Minimum Tank Size: 10 gallons
- Adult Size: 2-4 inches
- Temperament: Peaceful
- Care Level: Easy
- Diet: Omnivore
- Origin: Asia
- Temperature: 64-75° F
- Swimming Level: Top and Middle
Zebra danios are very active striped fish that like to swim in schools at the top of the aquarium. Unlike the other fish listed, zebra danios are a coldwater fish species that prefers subtropical water temperatures.

These fish are torpedo shaped with several horizontal black stripes that run from the end of the tail to the head. These fish are silvery-yellow underneath the stripes, though they might feature more vibrant yellow fins.

Zebra danios are one of the least-demanding fish to keep in the aquarium hobby and easily adapt to a variety of aquarium setups.

7. Siamese Algae Eater
- Scientific Name: Crossocheilus siamensis
- Common Names: Siamese algae eater, SAE, Siamese flying fox
- Minimum Tank Size: 30 gallons
- Adult Size: 4-6 inches
- Temperament: Peaceful
- Care Level: Moderate
- Diet: Omnivore but mainly herbivorous
- Origin: Southeast Asia
- Temperature: 75-79° F
- Swimming Level: Bottom
The Siamese algae eater, not to be confused with the more aggressive Chinese algae eater (Gyrinocheilus aymonieri), is one of the best algae eaters for the freshwater aquarium. Siamese algae eaters have a brownish-silver body with one thick black band that goes from the mouth to the base of the forked caudal fin.

These fish have an elongated body that helps them stay suctioned to rocks in their naturally fast-moving water environments. Siamese algae eaters may be present in groups as juveniles but can become slightly territorial as they age.

8. Convict Cichlid
- Scientific Name: Amatitlania nigrofasciata
- Common Names: Convict cichlid, Black convict cichlid, Zebra cichlid
- Minimum Tank Size: 30 gallons
- Adult Size: 4-6 inches
- Temperament: Aggressive
- Care Level: Moderate
- Diet: Omnivore
- Origin: Central America
- Temperature: 72-82° F
- Swimming Level: Middle
An aggressive species of Central American cichlid, the convict cichlid is an attractive fish with a deep blue body and mottled vertical black bands. These stripes are not neat, have rigid edges, and might not connect across the width of the fish.

Some special consideration is needed when housing these fish due to their aggressive nature. A minimum tank size of 30 gallons is recommended when keeping one or two, but at least 55 gallons is necessary when keeping other species.

9. Black Neon Tetra

Neon Tetra” class=”wp-image-547312″/>
- Scientific Name: Hyphessobrycon herbertaxelrodi
- Common Names: Black neon tetra
- Minimum Tank Size: 10 gallons
- Adult Size: 1-2 inches
- Temperament: Peaceful
- Care Level: Easy
- Diet: Omnivore
- Origin: South America
- Temperature: 72-77° F
- Swimming Level: Middle
Not actually related to the famous neon tetra (Paracheirodon innesi), the black neon tetra is named after the two horizontal black and white stripes that run along the side of the fish; the white stripe is on top of the black stripe. Underneath, the fish is a yellowy-silver.

A type of schooling fish, black neon tetras need to be kept in groups of at least 6 or more. They can be timid with bigger, more active species, but excel in a community tank setting.

🏆 Mark’s Pick: If I had to pick one striped fish that consistently impresses without the drama, it’s the Black Neon Tetra. I cared for a lot of these at the fish store and they’re some of the most reliable, beautiful little fish in the freshwater hobby. peaceful, hardy, and absolutely stunning in a school of 8 or more under good lighting. Zebra Angelfish are another top pick if you want a centerpiece fish with real visual impact, though they need more space and careful tank mate selection.

10. Clown Loach
- Scientific Name: Chromobotia macracantha
- Common Names: Clown loach, Tiger botia
- Minimum Tank Size: 125+ gallons
- Adult Size: 1 foot
- Temperament: Semi-aggressive
- Care Level: Moderate
- Diet: Omnivore
- Origin: Sumatra and Borneo
- Temperature: 72-86° F
- Swimming Level: Bottom
The clown loach should not be underestimated. For a long time, these colorful fish were considered to be beginner fish due to their relatively easy care and juvenile size. It wasn’t until recently that hobbyists discovered the true adult size of these fish, which is about a foot or more. Keep in mind that clown loaches like to school and need to be kept in large groups.

Still, the clown loach is one of the most attractive bottom-dwellers for the freshwater aquarium. These are orange fish with black stripes along the sides of their body. The caudal, ventral, and anal fins are typically dark red while the dorsal fin is black.

11. Golden Mbuna
- Scientific Name: Melanochromis auratus
- Common Names: Golden mbuna
- Minimum Tank Size: 55 gallons
- Adult Size: 4-5 inches
- Temperament: Aggressive
- Care Level: Moderate
- Diet: Omnivore
- Origin: Lake Malawi, Africa
- Temperature: 75-82° F
- Swimming Level: Middle
The golden mbuna is an attractive African cichlid with varying appearances, but never without stripes! Male golden mbuna cichlids especially change colors between breeding periods. Juvenile males and females typically display a deep yellow base color with horizontal black stripes. A breeding male will invert his colors over a few days, switching to a largely black body, with a silvery dorsal and white lateral line.

Golden mbunas are some of the most aggressive cichlids available and will need appropriate tank mates. Only one male should be kept per tank.

12. Electric Blue Johanni
- Scientific Name: Melanochromis johannii
- Common Names: Electric blue johanni, Rock-dwelling mbuna
- Minimum Tank Size: 55 gallons
- Adult Size: 4-5 inches
- Temperament: Semi-aggressive
- Care Level: Moderate
- Diet: Omnivore
- Origin: Lake Malawi, Africa
- Temperature: 75-82° F
- Swimming Level: Middle
Another striped cichlid, the electric blue johanni mbuna isn’t as aggressive as the golden mbuna. This makes them more appropriate for a mbuna community aquarium as long as the tank size allows.

While male electric blue johanni cichlids are striped tropical fish, with a shocking blue base color and vertical bars across their body, females look entirely different. Female electrics are fully yellow, which can make it slightly challenging to identify this species.

13. Demasoni Cichlid
- Scientific Name: Pseudotropheus demasoni
- Common Names: Demasoni cichlid
- Minimum Tank Size: 55 gallons
- Adult Size: 3-5 inches
- Temperament: Aggressive
- Care Level: Moderate
- Diet: Omnivore
- Origin: Lake Malawi, Africa
- Temperature: 75-82° F
- Swimming Level: Middle
Specific to the Pombo Rock ecosystem in Tanzania, the Demasoni cichlid isn’t a common fish to see available. These fish stay in rocky areas, rarely swimming into open water. This means the aquarium should be filled with cracks and crevices for them to live.

At first glance, this fish might resemble a front cichlid. These fish are light blue with vertical black stripes. There is no immediately noticeable difference between males and females, though males may be slightly larger and more territorial.

14. Royal Heckel Cross Discus

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- Scientific Name: Symphysodon spp.
- Common Names: Royal heckel cross discus
- Minimum Tank Size: 55 gallons
- Adult Size: 8-12 inches
- Temperament: Generally peaceful
- Care Level: Moderate to Expert
- Diet: Omnivore
- Origin: South America
- Temperature: 84-86° F
- Swimming Level: Middle
Discus are beautiful fish that have been selectively bred to display a variety of colors and patterns. The royal heckel cross discus is a mixture of orange, red, and blue with several vertical black stripes that vary in width. These are a specific variety of discus, so they may be more difficult to find and more expensive.

Discus are challenging aquarium fish. They do best when kept in small groups in a tank of their own. They are highly sensitive to improper water conditions and usually require more maintenance than other fish.

15. Pencil Fish
- Scientific Name: Nannostomus spp.
- Common Names: Pencil fish
- Minimum Tank Size: 20 gallons
- Adult Size: 1-2 inches
- Temperament: Peaceful
- Care Level: Moderate
- Diet: Omnivore
- Origin: South America
- Temperature: 75. 80° F
- Swimming Level: Middle to Top
An unusual schooling fish to find in the average hobbyist’s tank, the pencil fish is named after its swimming behavior that allows them to swim at a 45-degree angle. Pencil fish describes a genus of fish, in which there are almost 20 different species.

Here are some that are available in the aquarium hobby:
- Three-lined pencil fish (Nannostomus trifasciatus)
- Beckford’s pencil fish (Nannostomus beckfordi)
- Purple pencil fish (Nannostomus rubrocaudatus)
These fish mostly feature natural coloration with various browns, yellows, whites, and reds. Most of the species also have one or more horizontal black stripes that trail from the head to the tail.

16. Clown Killifish
- Scientific Name: Epiplatys annulatus
- Common Names: Clown killifish, Banded panchax
- Minimum Tank Size: 10 gallons
- Adult Size: 1-2 inches
- Temperament: Peaceful
- Care Level: Easy
- Diet: Omnivore
- Origin: West Africa
- Temperature: 68-80° F
- Swimming Level: Top
Killifish are an often overlooked option for the freshwater aquarium. This black and white fish with red fins looks just like a painted clown face! Sometimes, the white is replaced with a pale yellow.

Clown killis are small and easy-to-keep fish that are relatively forgiving of water parameters. They don’t school, but they like to be kept in small groups with one male and several females. Otherwise, clown killifish excel in a heavily planted aquarium with other peaceful tank mates.

17. Black Banded Leporinus
- Scientific Name: Leporinus fasciatus
- Common Names: Black banded leporinus, Banded leporinus
- Minimum Tank Size: 75 gallons
- Adult Size: 1 foot
- Temperament: Semi-aggressive
- Care Level: Moderate
- Diet: Omnivore
- Origin: South America
- Temperature: 72-82° F
- Swimming Level: Middle to Bottom
A very popular fish several years ago, the black banded leporinus is still a favorite fish with black stripes. These black and yellow fish increase stripes as they age, with juveniles having five bands and adults having ten.

These are very interesting fish that can jump high out of the water. Because of this, a tight aquarium hood is necessary. They are also large fish that are aggressive towards their own species and other similar-looking fish. Black banded leporinus originate from high-flow rivers and need similar conditions in the aquarium setting.

18. Convict Tang
- Family: Acanthuridae
- Size: 8 inches
- Origin: Indo-Pacific
- Tank Size: 125 gallons
- Reef Safe: Yes
- Available As Tank Bred: No
Convict tangs are a popular saltwater species, possibly because they don’t look like any other tang. These black and white fish have very delicate black stripes along their body. Some individuals may feature varying shades of yellow along their dorsal regions.

Regardless of their appearance, these are still tangs that require a large tank for swimming and grazing. They are one of the more peaceful species of tang available, and other related species might be overly aggressive. It should also be noted that these fish are often sick or stressed when first introduced into the aquarium.

19. Three And Four-Stripe Damselfish
- Family: Pomacentridae
- Size: 2-4 inches
- Origin: Western Pacific
- Tank Size: 10 gallons
- Reef Safe: Yes
- Available As Tank Bred: Yes
Three and four stripe damselfish are a popular addition to the novice’s saltwater aquarium. These are hardy, inexpensive fish that are almost guaranteed to survive all beginner’s mistakes. However, hobbyists quickly find out that these black and white damsel fish are overly aggressive and often need to be rehomed after a few months.

These are the most pure black and white fish available on this list, with white bodies and three or four broad black stripes accordingly. Aggression levels do not vary much between the two species. If you want a less aggressive damsels, try a yellow tail or azure.

20. Black And Gold Chromis Damsel
- Family: Pomacentridae
- Size: 3-5 inches
- Origin: Indo-West Pacific
- Tank Size: 30 gallons
- Reef Safe: Yes
- Available As Tank Bred: No
The black and gold chromis damsel can look a lot different depending on how old your fish is. As a juvenile, this fish is yellow with black stripes that run parallel along the body. As adults, these fish’s faces turn brown while the end half of their body stays yellow.

Black and gold chromis damsels aren’t commonly seen in the aquarium hobby but should be treated as another species of damsel. That means the same levels of aggression but also the same hardiness and ease of keeping.

21. Lionfish
- Family: Scorpaenidae
- Size: <18 inches
- Origin: Indian and Western Pacific Oceans
- Tank Size: 55 gallons
- Reef Safe: Yes
- Available As Tank Bred: No
There is some discussion about keeping these striped marine fish in the aquarium. The lionfish is native to the Indian and Western Pacific Oceans but has since devastated portions of the Western Atlantic Ocean. Regardless, lionfish are a popular addition to the reef tank; these fish can be kept with colorful corals, but tank mates need to be carefully selected in return.

There are many species of lionfish, but most are red and white striped. This coloration continues to the dorsal spines and other fins.

22. Banded Angelfish
- Family: Pomacanthidae
- Size: 4-5 inches
- Origin: Indo-Pacific
- Tank Size: 75 gallons
- Reef Safe: With caution
- Available As Tank Bred: No
The banded angelfish (video source) is one of the most obvious fish with black stripes on this list! These saltwater angelfish have evenly spaced black and white stripes along the sides of their body. Some individuals have shades of yellow on their bellies.

The banded angelfish is a type of angel, meaning that they may or may not be reef-safe; they may pick at corals and small crustaceans. These black and white fish can be territorial and difficult to feed. Some helpful tips suggest feeding live sponges, making this a difficult fish to keep for inexperienced hobbyists.

If you are looking for a more hardy stripped angelfish (though it’s a yellow not black stripe), you can check out the Asfur Angelfish from the red sea, it gets a lot larger, but adapts better in captivity. A Lamarck Angelfish is also another great alternative.

23. Heniochus Butterflyfish
- Family: Chaetodontidae
- Size: 8-10 inches
- Origin: Indo-Pacific
- Tank Size: 125 gallons
- Reef Safe: No
- Available As Tank Bred: Yes
The heniochus butterflyfish is an unassuming fish with some special requirements. This is a large black and white striped fish originating from the Indo-Pacific region that cannot be kept with corals. Other species should also be added alongside the heniochus butterfly fish or beforehand as these fish can become aggressive.

If you have the space, the heniochus butterflyfish is bold with a white body, two broad vertical black stripes, and yellow fins.

24. Banggai Cardinalfish
- Family: Apogonidae
- Size: 2-3 inches
- Origin: Banggai Islands, Indonesia
- Tank Size: 10 gallons
- Reef Safe: Yes
- Available As Tank Bred: Yes
An endangered species (though all fish purchased now are tank bred), the Banggai cardinal is a beautiful and easy-to-keep small fish with black stripes. These are signature fish of the reef tank and are perfectly compatible with a variety of corals and community fish. These cardinals can be paired and successfully bred at the hobbyist level.

The Banggai cardinal has two high dorsal fins that extend the appearance of their vertical stripes. These dark stripes are also outlined in a pearlescent white, which further accentuates their appearance.

25. Flame Angelfish
- Family: Pomacanthidae
- Size: 4-6 inches
- Origin: Pacific Ocean
- Tank Size: 75 gallons
- Reef Safe: With Caution
- Available As Tank Bred: No
If you’re looking for a fish with less obvious stripes, then the flame angel might spark some ideas. The flame angelfish is a fish with black stripes, but minimally. By this, we mean that the short, mottled black stripes are more like an accent than a feature of this fish’s bright red and orange coloration.

The flame angelfish is a popular reef fish, though not every individual is safe with corals. Otherwise, these saltwater fish are relatively easy to keep as long as they are added last to the aquarium.

Bonus Species

Here are species we run out of space to write but also have black stripes:
- Sergeant major
- Kribensis
- Bolivian Ram
If we miss a fish you like add it in the comments and we will include it when we update the post.

FAQs

What fish has a black stripe?

There are many fish with black stripes! Some popular freshwater fish include the zebra danio, zebra angelfish, and convict cichlid. Some marine life options are the convict tang, lionfish, and the black and white clownfish.

What kind of fish is white with black stripes?

Not all striped fish are black and white, but here are some of the most common species with that color combination: skunk cory, zebra danio, striped damselfish, and Banggai cardinals.

What type of fish has stripes?

Stripes are a common pattern to see on both freshwater and saltwater fish that live among plants or corals. This pattern can help break up the silhouette of the fish, helping protect them from predators.

What is a small freshwater fish with black stripes?

The smallest species of striped freshwater fish on this list is the clown killifish.

What is the black and white striped fish called?

There is no specific name for a black and white striped fish. Sometimes, there is an indication as to the color of the fish in the name, but most times they are named after a behavior, overall color, or scientist.

What is the fish that looks like a zebra?

The zebra pleco looks most like a zebra, with bright white and deep black alternating stripes.

Final Thoughts

Stripes are a great way to add interest and color to a freshwater or saltwater aquarium. While some striped fish are black and white, others feature bright colors and interesting patterns alongside defined lines. Before adding a striped fish to your aquarium, make sure that the species is compatible with the other fish in the aquarium.
October 31, 2023
Ich on Betta Fish: My Go-To Treatment and Prevention Tips
I’ve dealt with ich more times than I can count. both on bettas I kept personally and on fish I cared for during my years at the fish store. The first time you see those white spots on your betta it can look alarming, but the good news is ich is very treatable if you catch it early and act fast. In this guide I’ll walk you through how to diagnose and treat it, and just as importantly, how to prevent it from ever getting into your tank in the first place.
Key Takeaways
- Ich is a common illness in betta fish that typically causes white spots on their skin and fins.
- It is a highly contagious parasitic infection that is fatal to the host fish if left untreated and is easily spread to other tank mates.
- Ich can be treated using various medications, aquarium salt, and heat treatments. Medications are available from pet stores, veterinarians, and online.
- Treating aquarium fish without consulting a veterinarian is always risky. Seek assistance if you are not confident in your diagnosis or treatment plan.
What Is ‘Ich’?

Ich is a protozoan (single-celled) parasite known scientifically as Ichthyophthirius multifiliis. It is a common infection of Betta fish/ Siamese fighting fish that causes a condition commonly known as white spot disease.

Ich is fatal if left untreated, so this is an infection that you will need to treat right away. Fortunately, it is often curable if you catch it on time. I’ll cover some treatment options a little later in this guide, but let’s start by getting to know more about the parasite.

Ichthyophthirius multifiliis Lifecycle

Ich parasites cannot survive without a freshwater fish to feed on, and their life cycles includes three stages. Understanding this lifecycle is essential for curing your fish and making sure it does not become reinfected.

Continue reading to learn about the three major life stages of the ich protozoan.

Source
- Trophont – The Feeding Stage
During the trophont stage, the ich parasite is actively feeding on your fish’s tissues. Unfortunately, the parasite is protected by your betta’s body during this stage, so they are not affected by medicines and other treatments.
- Tomont – The Reproductive Stage
Once the ich parasite has finished feeding, it leaves the fish’s body and sinks down to the bottom or attaches to an object in the water. The tomont covers itself in a protective covering called a cyst and then multiplies into hundreds of new parasites. Yikes!

Experts from the Southern Regional Aquaculture Center report that ich can occasionally form tomonts under the host fish’s mucus layer, which makes them much harder to control.
- Theront – The Infective Stage
The developing tomites are still safe from treatment within their protective cyst, but after a few days they hatch out and go in search of a new host. These free swimming parasites are called theronts, and they are not immune to treatment.

The theronts must find a new fish to feed on to survive and start a new cycle. Therefore, any parasites left in a tank without live fish will eventually die.

How Does it Spread?

Ich is highly contagious. It can spread between fish or be introduced on plants or in water that is shared between aquariums. Your betta fish may already have ich when you bring it home from the pet store, or it may catch the parasite from any new fish you add to the tank.

Diagnosis

Accurately diagnosing an ich infection requires a microscope and a trained expert, although this widespread freshwater fish illness causes some common symptoms that are usually visible to the naked eye. Let’s take a look at some of the typical signs of ich and symptoms in betta fish.

Visual Signs

An ich infection presents with white spots on your fish’s skin and fins, which is why this parasitic infection is often called white spot disease.

It often shows up first around the gills and fins, but as the infection progresses you may see white spots on any part of the body, including the eye. These white spots are usually quite spread out, rather than clustered in small areas.

Ich also causes stress which can cause clamped fins and loss of color.

Behavioral Clues

Your betta fish may show other symptoms like a lack of appetite and low activity levels. Infected fish will also try to scratch their skin against the substrate or other objects in the aquarium. This is known as flashing and it’s another common sign that your betta fish has ich.

Treating Ich on Betta Fish

Where, when, and how to tackle this common fish disease are questions I get frequently. Let’s break down each in detail.

Where To Treat

Your first consideration before starting treatment is choosing where to treat your fish. If you have a betta only aquarium without any other animals or live plants, you may simply treat your fish in its tank. However, you may need to move your fish to a separate hospital tank for treatment if you have other animals that are sensitive to ich medications.

It may also be helpful to move your betta into a smaller hospital tank if your main aquarium is very large. That will give you the freedom to clean the tank more thoroughly and reduce the amount of medication you need to apply.

Ich is highly contagious, so you should treat all the fish in your aquarium at the same time, even if they don’t look sick.

When To Treat

Act fast and begin your ich treatment as soon as possible. This will improve your chances of saving the host fish and preventing the parasite from spreading to other fish in the tank.

The parasite takes less than a week to complete its life cycle at temperatures in the mid to low 80s, so you can treat this condition relatively quickly in a heated betta aquarium. However, ich cannot be treated during its feeding and reproductive stages so make sure to continue treating for several days to ensure that all the parasites are destroyed.

How To Treat

Treating your betta fish with a commercially prepared ich medication is the preferred method and one you can do yourself if you’re comfortable with the process. Some sources state that ich can be controlled through heat treatments alone, and this could be a good option if you don’t have access to medication.

Continue reading to learn more about these methods.

🧂 Mark’s Go-To: Aquarium Salt
Before I reach for a chemical medication, my first choice for treating ich. especially in a betta tank without live plants. is aquarium salt. It’s effective, inexpensive, and doesn’t leave chemical residues behind. I dose 1 tablespoon per 5 gallons, combined with a temperature raise to around 86°F, and maintain it through the full treatment cycle. The one big caveat: salt is not plant-safe. If your betta is in a planted tank, skip salt and go straight to a medication like Ich-X instead.

Treating with Medication

Step 1. Clean the tank

Start by cleaning your tank thoroughly and doing a large water change to improve your water quality and suck up any free swimming parasites in the water. Use a gravel vacuum to suck up as much waste from the substrate as possible. This helps to remove reproductive tomonts before the free swimming parasites can emerge.

Next, clean your filter media in old aquarium water and remove any activated carbon media that may soak up your chemical treatments.

In their guide to Ichthyophthirius multifiliis (White Spot) Infections in Fish, experts from The University of Florida’s IFAS Extension recommend cleaning the tank every second day when treating ich in aquarium fish. Just be sure to treat the new aquarium water with a dechlorinator and warm it to the correct temperature to avoid stressing your fish.

Step 2. Raise the temperature

The next step toward treating ich in betta fish is to heat up the tank. Raising the temperature of the aquarium slightly does not necessarily kill the ich parasites, but it does speed up their lifecycle, which is important because they can only be destroyed during the free-swimming stage.

Betta fish live in tropical climates, but they cannot survive in very hot water. A temperature of 82 – 86 degrees Fahrenheit is generally recommended for betta fish ich treatment. Set your heater to this temperature and use a thermometer to ensure that your water remains within this temperature range.

You may notice your fish breathing up at the surface after increasing water temperature. Increase oxygenation in your tank by aiming your filter outlet toward the surface or, even better, run an airstone.

Step 3. Chemical treatment

Treating ich in betta fish typically involves applying a chemical treatment at regular intervals. The recommended dosages and intervals will vary between products, so always follow the instructions and dosage of your chosen medicine.

When measuring out the dosage, keep in mind that your tank does not only hold water. A 10-gallon tank may hold just 9 gallons, depending on the amount of substrate and decorations you have added.

If your fish do not recover after treatment, you may be dealing with a different type of infection. In that case, consult a veterinarian for advice because some other conditions such as epistylis can also cause white spots on tropical fish.

Choosing Ich Medicine

There are many ich medications on the market, including popular products like Ich X, Interpet Anti-White Spot, and API Liquid Super Ick Cure. The products may be in liquid or tablet form, and their use and dosage varies.

Best For Ich

Hikari USA Ich-X

Ich-X is the best all around medication when it comes to treating Ich

Buy On Amazon

The active ingredients in most ich medications include:
- Malachite green
- Formalin
- Copper Sulphate
- Aquarium Salt
Method 2 – Heat Treatment

According to experts from the University of Florida IFAS Extension, it is possible to treat ich in freshwater aquariums by gradually switching between colder water and higher temperatures.

Their method involves gradually raising the temperature in the tank to 90 degrees Fahrenheit and keeping it there for a full day or 24 hours. The temperature is then gradually lowered to 70 degrees and held there for 48 hours. This sequence should be repeated for two weeks and combined with regular water changes.

However, there are risks involved when changing water temperatures in your betta tank. Betta fish are pretty hardy, but they prefer temperatures between about 75 and 82 degrees Fahrenheit for long-term care. Lows of 70°F and highs of 90°F are outside of their comfort range and will cause them additional stress.

Preventation

Many new fish keepers discover that their fish is infected with ich parasites in the first few weeks after adopting their new betta fish. Unfortunately, you can’t always tell if your fish is infected when you pick it out at the store, but there are some steps you can take to prevent ich from infecting your pet fish.

Buy Right

First off, always buy your fish from a reputable breeder, trusted online retailer, or fish store that takes pride in their livestock. Ask the salesperson if they’ve had any problems with illness recently, and look around for any signs of illness in their tanks. Things like torn fins, heavily breathing, cloudy eyes, or white spots are clear signs. Fish should be eating before you purchase them.

⚠️ The Two Biggest Mistakes I See: The first is skipping quarantine. Even fish from a good store can carry ich in its dormant stage. you won’t see any white spots until it’s already in your main tank. Running a 2. 4 week quarantine before adding anything new is the single most effective prevention step you can take. The second mistake is buying stressed, low-quality stock from overcrowded tanks. Fish that are already compromised are far more susceptible to ich outbreaks. Buy from reputable sources, and quarantine everything. every time.

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Quarantine

Ich parasites cannot infect your tank from the air but there’s always a chance of bringing them in with new fish or aquatic plants. Experts from the University of Florida Extension suggest you quarantine new fish for at least a month before adding them to your tank. That way you can keep an eye on them and treat any problems before they spread to your other pets.

Setting Up A Quarantine Tank

You can use a plastic container or a glass aquarium as your quarantine tank, but you should run a heater, filter, and airstone to keep your new fish comfortable during this time.

A new quarantine tank will not be cycled, which can cause dangerous ammonia spikes in the water. Use your water test kit or test strips to monitor water quality and perform water changes when necessary.

Contain The Infection

Be careful not to spread the infection if you have more than one aquarium. The parasites can be introduced on equipment like gravel vacuums, aquarium nets, or aquascaping scissors. You should also avoid dumping affected water into or tanks or contaminating or tanks with equipment that has been in the diseased tank. Never dump treated water into local waterways or rivers.

FAQs

How do you treat ick on a betta fish?

A number of medications are available for the treatment of ich on freshwater fish. These products should be used carefully by following the directions on the packaging. You can speed up the treatment process by heating the water in your betta fish tank to 82-86 degrees Fahrenheit, and remove some of the parasites by performing water changes.

Is Ich fatal to betta fish?

Betta fish ich is a highly contagious protozoan parasite that is generally fatal if left untreated. However, fish owners can save their pets if they catch the condition early enough and use appropriate medications and treatments.

What does ick look like on a betta?

The most common symptom of ich in betta fish is small white spots that look like salt grains. Each white dot is the site where an external parasite is feeding on the fish, causing irritation and a small injury. Infected bettas develop other symptoms like clamped fins and a lack of appetite as the infection affects their immune system.

Why does my betta have a white spot on his head?

White spots on a betta fish are often caused by ich. However, a white spot on its head is likely not ich if the spot is larger or fuzzy. These big spots are usually fungal infections or parasitic conditions lie hexamita. Careful observation and taking photos to check with an experienced hobbyist or vet will help determine what it might be.

Can fish recover from white spot?

Yes, many fish including Bettas can successfully recover from white spot as long as you treat the condition and catch it early. If you do not treat the condition in time, it’s likely that further damage can be done to the point where a bacterial infection occurs which will ultimately kill your fish. However, in saying that, on the freshwater side of the hobby the outlook is typically good for fish to recover from an ich infection.

Why is my betta getting white spots?

Bettas get white spots from being stressed than the parasite infecting them. However, they cannot get infected if the parasite does not exist in the tank. To completely eliminate the chance of ich ever entering your system, you must quarantine all fish, inverts, and plants before they go into your tank. The reality though is that the vast majority of hobbyist will not do this, so keeping stress low and not introducing an already infected fish will lessen your chances.

Final Thoughts

Ich is a very common condition that affects betta fish and their tank mates in aquariums all over the world. It is a serious situation, and it can be really distressing to find your pet betta fish covered in tiny white spots. However, betta fish ich is curable, and many fish keepers choose to treat their pets at home with great success.

Remember to consult a veterinarian if you’re unsure about the diagnosis and treatment plan, and if you are going to treat your own pets, be sure to follow the instructions on the medication.

Have you treated betta fish ich in your aquarium? Share your experiences in the comments below!

📘 Want to learn more? This article is part of our complete Betta Fish Guide. your ultimate resource for betta care, types, tank setup, feeding, tank mates, and more.
October 29, 2023

Veiltail Betta Fish Care Guide: What I’ve Learned Keeping the Most Common Betta

Most Veiltail Betta Fish owners kill their fish slowly without realizing it. Tiny bowls, no heater, zero filtration. I have kept bettas for over 25 years and the difference between a Veiltail Betta Fish surviving and actually thriving is night and day. This is what real Veiltail Betta Fish care looks like.

Every kid’s first fish should not be a death sentence for the fish.

If your Veiltail Betta Fish is not flaring, building bubble nests, and actively exploring, something is wrong with the setup.

A healthy Veiltail Betta Fish lives 3 to 5 years. That means years of weekly water changes, a heated and filtered tank, and a varied diet. This is not a disposable pet.

A betta in a filtered, heated 5-gallon tank acts like a completely different animal than one sitting in a cup at the pet store. The difference is not subtle. It is dramatic.

What It Is Actually Like Living With Veiltail Betta Fish

Your Veiltail Betta Fish will learn to recognize you. It will swim to the front of the tank when you approach, flare at its own reflection, and patrol every inch of its territory like it owns the place. Because in its mind, it does.

Feeding time is the highlight of the day. Bettas are aggressive eaters that will snatch food from the surface the moment it hits the water. They prefer variety. Pellets one day, frozen bloodworms the next, an occasional freeze-dried daphnia treat.

Bubble nests appear without warning. Your male will spend hours building and repairing a cluster of bubbles at the surface. This is normal healthy behavior, not a sign that it needs a mate.

At night, bettas sleep. Sometimes in strange positions. On a leaf, wedged behind a filter, or resting on the substrate. The first time you see it, you will think something is wrong. It is not.

Hard Rule

Veiltail betta tails are susceptible to fin rot and fin curling in poor water conditions. Maintain pristine water quality with weekly changes. Do not keep them with fin-nipping species – the long tail is a target for any nippy fish.

Key Takeaways
Species Overview
Classification
Understanding Them
Behavior And Temperament
Veiltail Betta Care
Feeding
Choosing Tank Mates for Your Veiltail Betta
Breeding
Common Health Issues
Purchasing
Frequently Asked Questions
Closing Thoughts
What Most Care Guides Get Wrong
Is the Veiltail Betta Fish Right for You?
Species Comparison
The Reality of Keeping Veiltail Betta Fish
What It Is Actually Like Living With Veiltail Betta Fish

What Most Care Guides Get Wrong About Veiltail Betta Fish

Want a centerpiece fish for a nano tank? Get a betta. Want a peaceful community schooler? Get ember tetras instead. Want low maintenance? Get neither. Both need real care.

The most damaging myth about Veiltail Bettas is that their flowing fins are purely decorative. Those long fins create real practical challenges. Strong filter current can exhaust them, sharp decorations tear their fins easily, and they’re significantly slower swimmers. Silk plants and gentle filtration aren’t suggestions, they’re requirements.

The Reality of Keeping Veiltail Betta Fish

They are not low-maintenance pets. Bettas need a heater, a filter, and weekly water changes just like any other tropical fish. The myth that they thrive in small, unfiltered containers has killed millions of these fish. A proper betta setup starts at 5 gallons with a gentle filter and a heater set to 78 degrees.

Aggression varies wildly between individuals. Some bettas tolerate tank mates without issue. Others attack anything that moves, including snails. There is no way to predict this before you try it. Always have a backup plan if your betta turns out to be a loner.

Fin rot is the number one killer. Poor water quality causes fin rot faster in bettas than in almost any other fish. Those long, flowing fins are bacteria magnets in dirty water. Weekly 25% water changes are not optional. They are the single most important thing you do for this fish.

Biggest Mistake New Owners Make

Putting a betta in an unheated bowl and calling it a day. Bettas are tropical fish that need 76 to 82 degrees. Below 74, their immune system shuts down and they stop eating. A $15 heater is the difference between a vibrant fish and a slow death.

Expert Take (Mark Valderrama, AquariumStoreDepot)

After 25 years of keeping bettas, the single best upgrade you can make is a quality heater in a 5-gallon filtered tank. Everything else matters less than getting the basics right first.

Key Takeaways

Veiltail bettas are beautiful fish with long, flowing tails that come in many vibrant colors and can live up to 5 years and grow to 3 inches.
Like all bettas, they should be kept in adequate spaces, with 5 gallons being the best size for a solo fish
To create a suitable habitat for veiltail bettas, replicate their native environment of slow-moving or still waters with warm temperatures & almond leaves help maintain a healthy environment.
Bettas are insect eaters and need insect matter and high protein diets. Food like Fluval Bug bites are excellent for them
When choosing tank mates be sure to pick nonaggressive fish. Proper care and monitoring is essential for the health of your veiltail betta.

ASD Difficulty Rating: Tier 1 – Beginner

Veiltail bettas are the most common and widely available betta variant, with long flowing tails. Same care requirements as all bettas: single male, heated filtered tank, 5-gallon minimum. More fin rot risk in poor water.

Species Overview

Scientific Name	Betta splendens
Common Names	Veiltail Betta Fish, Siamese Fighting Fish
Family	Osphronemidae
Origin	Thailand (Southeast Asia)
Diet	Omnivore
Care Level	Intermediate
Activity	Slow to Moderate
Lifespan	2. 5 years
Temperament	Peaceful (Aggressive to own kind)
Tank Level	Middle to top
Minimum Tank Size	5 gallon
Water Temperature Range	76°-81°F
Water Hardness	5 to 20 DH
pH Range	6.5. 8.0 (for most varieties)
Filtration/Water Flow	Low
Water Type	Freshwater
Breeding	Egg-layer
Difficulty to Breed	Easy to breed
Compatibility	Community fish (when with other species)
OK, for Planted Tanks?	Yes

Classification

Taxonomic Rank	Classification
Common Name	Veiltail Betta
Scientific Name	Betta splendens
Order	Anabantiformes
Family	Osphronemidae
Genus	Betta
Species	B. Splendens

Understanding Them

Betta splendens, otherwise known as Veiltail bettas or Fancy Bettas, are a popular variety of Siamese Fighting Fish widely recognized for their captivating coloring and long flowing fins. When these beautiful creatures are easy to care for in an aquarium, they must be given proper care to ensure their long term health. It is the most common type of betta you will come across in stores and is very affordable.

A deeper understanding about where this type of fighting fish originated from can also aid us in caring for them better. Let’s dive into their background further to learn where they came from.

Origins And Habitant

Veiltail bettas are a Southeast Asian species found in countries like Thailand, Cambodia, Indonesia and Vietnam. They populate rice paddies in the wild and were originally kept by locals to breed to fight in betting competitions.

These Siamese Fighting Fish require calm waters with hardly any current for optimal growth, exactly as it is in their natural habitat. To replicate this environment at home when setting up the tank, avoiding too much flow and maintaining an appropriate temperature range should be given top priority. This will ensure the healthy development of veiltail bettas over time.

The Fighting Formula

Thailand’s secret, when it came to fighting betta fish, was in the use of almond leaves. The introduction of almond leaves to a betta tank is incredibly beneficial for veiltail bettas. You can help maintain strong and healthy fish by treating water quality through the release of tannins that lower pH levels, thereby creating an ideal environment for these species¹.

The presence of antifungal and antibacterial agents in this natural resource serves as a mild disinfectant within tanks, which toughens the scales & skin of the fish, making them stronger competitors when it comes to fighting diseases or illnesses. Altogether, adding almond leaves to your aquarium will provide significant benefits to keep your finned friends happy & active!