Author: Mark Valderrama

Otocinclus are one of my favorite algae grazers for planted tanks — they’re tiny, peaceful, and do a great job on soft green algae and diatoms without disturbing plants or shrimp. I’ve kept them in my own tanks and the one thing I always warn people about is timing: otos are notorious for crashing after purchase due to the stress of collection. This guide covers how to pick healthy ones and keep them thriving long-term.

Otocinclus are among the best algae grazers in freshwater — peaceful, shrimp-safe, and effective on soft green algae and biofilm. But they have a well-earned reputation for being fragile right after import. Most otos are still wild-caught, which means they go through significant stress in the collection and shipping process. I always tell people: don’t buy otos the week the store gets them in. Let them settle for at least a week, and make sure you have an established tank with natural algae growth ready to go before you bring them home. Get those two things right, and otos are genuinely easy to keep long-term.

Species Overview

Origin and Habitat

There are nearly 20 different species of known otocinclus catfish. Not all of these species have made their way into the aquarium, but the ones that have can be difficult to tell apart from one another. In general, any otocinclus species that is available for sale in the aquarium hobby will be labeled as a general type of otocinclus catfish.

That being said, all members of this genus are found in similar environments and water conditions throughout South America, including the Amazon basin. There, they can be found at the margins of small rivers and streams, hiding and feeding in dense vegetation. They have also been documented occupying floating mats of vegetation away from the edge of the water.

Appearance

Several species of otocinclus have made their way into the aquarium hobby. Each one has a slightly different appearance, though most average hobbyists are unable to tell them apart.

Here are some of the most common oto catfish species you’re likely to come across:

Otocinclus vestitus. This species lacks a black tail marking or a white border. Instead, the midlateral black stripe combines with the mottled patterning and continues onto the tail in a straight fashion.

Otocinclus macrospilus. This species most notably has a large, black marking at the base of the caudal fin. Some broken white outlining can be observed in between the mottled patterning and midlateral dark line.

Otocinclus vittatus. This species has a very obvious white border to its midlateral black line. There is no observable black marking at the base of the tail, either.

Most species of otocinclus grow to be about 2 inches at mature size, though some can grow to be close to 4 inches. The golden otocinclus (Otocinclus affinis, now described as Macrotocinclus affinis) is the smallest oto documented, growing to only about 1.5 inches; however, this species is rarely seen in the aquarium hobby.

Not only are species of otos confused with one another, but they’re regularly confused with another problematic fish, the Chinese algae eater.

Otocinclus vs. Chinese Algae Eater

Chinese algae eaters (Gyrinocheilus aymonieri) are very similar in appearance to otocinclus catfish to the untrained eye. In almost all ways, the otocinclus is the much better option as a tank mate and as an algae eater.

Chinese algae eaters end up being problematic for many hobbyists. These Asian fish grow to be very large, reaching a potential 10 inches at mature size. They have a similar body shape and coloration to small otos.

The main difference is that Chinese algae eaters have a very bold and black midlateral line with a yellow margin. Chinese algae eaters also lack the mottled patterning that otos have on their dorsal areas. Siamese algae eaters (Crossocheilus oblongus) share many of these same traits but are not as big of a mistake as Chinese algae eaters are. Here’s why.

Chinese algae eaters are often sold as juveniles when they are only a couple of inches long. Unknowing hobbyists find these readily available fish as an initial answer to their algae problems. As time goes on, they soon find that their once-friendly fish start to become very aggressive and more interested in sucking other fish than cleaning algae.

In extreme cases, Chinese algae eaters will suck the slime coat off of tank mates and cause extensive injury or death.

Otocinclus Catfish Care

Otocinclus catfish are not beginner fish. They may look like the perfect solution to a new tank struggling with algae, but they do best in a mature setup where there is a constant supply of algae and other plant-based foods to graze on. These fish are notorious for starving to death when conditions are not met, which can cause devastation when kept in a school.

With some proper care and time for acclimation, otos are easy to keep.

Tank Size

Otos are small fish with a big appetite. Many sources say that a group of otocinclus catfish can happily live in a 10 gallon tank. While this isn’t completely untrue, making sure that your fish get enough food in so small of a freshwater tank can prove to be incredibly challenging.

Instead, many hobbyists recommend at least a 20 gallon long aquarium with bigger always being better. It should be noted that no matter the size of the aquarium, these fish are very shy and masters of camouflage. They will not fill up a tank but will struggle to survive if enough resources aren’t given from the beginning.

Aquarium Setup

Otocinclus catfish should only be added to an established aquarium. An established aquarium will provide both stability and food for your otos to live.

In the wild, these fish are found in relatively slow-moving waters with dense vegetation. This can be replicated in the aquarium by providing plenty of background plants, like species of Vallisneria and Rotala.

Floating plants, like frogbit (Limnobium laevigatum) and water lettuce (Pistia stratiotes), will also provide food and additional shelter. Remember, these are shy fish and prefer plenty of coverage. Either use floating plants to create areas of shade throughout the aquarium or use dim lighting with less light-demanding plant species.

In addition, tannins from various organics and botanicals may be used to stain the water brown and lower its pH. Plenty of rocks and wood structures should also be placed throughout the tank to provide additional surface area for algae and biofilm to grow as well as to provide your fish with additional hiding spots.

Eventually, your otocinclus catfish will get to know you and won’t be as scared. Unlike other catfish, otos are diurnal and will be active during the daytime. They’ll regularly be found on the aquarium glass and interact with other fish in the tank.

Water Parameters

Another difficulty of keeping otos is maintaining water parameters. These fish are not hardy and need an aquarium that has reached mature stability. They will quickly succumb to any traces of ammonia or nitrite.

That being said, it is better to keep a high amount of nutrients available in an otocinclus catfish tank setup so that algae may grow. Algae feed primarily on nitrates and phosphates, which can be introduced through food or water changes depending on the source water.

As we’ll see, these fish are demanding eaters and need to be fed regularly. Heavier feedings can help keep nutrients up to continue plant and algae growth.

Otherwise, otocinclus can tolerate slightly acidic conditions, preferring a pH range between 6.8 to 7.5. A stable water temperature between 74°F to 79°F must also be maintained with an aquarium heater.

Filter and Aeration

Otocinclus need good water quality, but low water flow. It is better to have an oversized filter than not enough mechanical, biological, or chemical filtration for these fish.

Otos will do best with a hang on the back filter, canister filter, or sump filtration that is rated for at least 2x the size of the aquarium; for smaller setups, a sponge filter may be most favorable to provide your otos with a concentrated grazing area. While these small fish should be able to swim against any currents made by the filtration, it might be necessary to baffle the return rate.

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Surface agitation created by filtration should be enough to keep dissolved oxygen levels high in the aquarium. An air stone may be added for additional oxygenation and circulation.

Keep in mind that otos need to be kept in groups so this bioload is amplified!

Lighting

As mentioned before, otocinclus catfish are shy. However, they aren’t especially sensitive to light.

Lighting will depend mostly on which species of plants are being kept in the aquarium. Higher intensities will likely be needed for more challenging species. This should not affect the behavior of your otos, but floating plants and extra structures throughout the tank can help create shaded areas of relief for your fish.

Community Tank Mates

If otos weren’t so difficult to feed, they would truly be the best community algae eater. These fish may be shy, but they’re usually completely unbothered by other peaceful fish in the aquarium. That being said, they may be more likely to hide if overly active or aggressive fish are present.

Some of the best community aquarium tank mates for otos are:

• Tetras
• Rasboras
• Danios
• Dwarf gouramis
• Small loaches

In general, it’s best to avoid keeping otos with other bottom-dwelling fish. When otocinclus catfish are not cleaning the glass or a plant, they’ll be found at the bottom of the tank. Having another group of bottom-dwelling fish could potentially take away food options and stress out your fish.

Another popular tank mate recommendation for otocinclus catfish is freshwater shrimp. However, shrimp also love to graze on algae, which could lessen food availability as well if it’s an especially clean aquarium.

How Many Oto Catfish Can Stay Together?

In their natural habitat, otocinclus have been observed shoaling by the thousands. These fish love each other’s company!

Though these fish don’t form tight schools like some other freshwater fish, they will definitely be seen interacting with one another when given the chance. At least 6 otocinclus catfish should be kept per tank at all times. Any less than this can cause your fish to become extra shy.

Of course, it is best to get as many otos as you can comfortably fit into your aquarium. Just keep in mind that you need to be able to feed them all, too!

Fish Food and Diet

Here’s where the trouble begins. Getting otocinclus to eat and keeping them fed is the main difficulty of keeping these fish. Too often, these freshwater fish are sold as a quick fix for beginner hobbyists going through the ugly algae stages of a tank cycle. Once that cycle finishes and the otos have cleaned the tank, they are left to starve and eventually die.

The good news is that feeding otos isn’t actually hard.

Otocinclus catfish are primarily herbivores. They feed on aufwuchs, which is the organic film that covers all surfaces of aquatic ecosystems. Within aufwuchs are microscopic organisms and plants. This film is developed over time as the aquarium becomes more established.

In addition, otos will gladly eat most soft algae species within the freshwater aquarium; they are less likely to touch more macroscopic varieties, but hobbyists usually have complete success.

In order to keep food reserves up, the aquarium needs to be healthy: a healthy system equals a healthy fish. In some ways, it is better to think of feeding the tank instead of feeding the individual fish. But how do you do this?

First, give the planted tank time to mature. Full stability is reached around the 1 year mark. Next, feed the tank heavily. Provide live, frozen, and freeze-dried options to other fish in the aquarium. Finally, ensure that you feed a high-quality diet to your oto.

It is rare for otos to accept algae wafers or pellets, but not impossible. More likely, your otocinclus will appreciate a herbivorous gel food. This can be made at home or purchased from your local aquarium store.

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Another option is to provide your otocinclus catfish with fresh, blanched vegetables. Simply buy a variety of vegetables, like zucchini, cucumber, and lettuce. Cut them up and boil them for a couple of minutes. Move them to a bowl filled with ice cubes to finish the blanching process. These vegetables can then be moved to the freezer for storage.

A piece of the vegetable can be fed to the tank every couple of days, or as often as your fish are able to eat. This can become very messy over time so it’s important to remove vegetables that have been in the tank for a while.

What To Know Before Owning

The key to successfully keeping otocinclus is starting with healthy fish.

As we’ll see, oto catfish have yet to be bred at the commercial scale, making most of the individuals available wild-caught. This can make the transition to a planted aquarium very difficult in regards to disease and diet.

When picking out your otocinclus from the fish store, ask to see them eat and inquire about what they’re being fed. This should hopefully make the transition from the aquarium store to the home freshwater aquarium easier; unfortunately, it can still be difficult to get your fish to eat.

A healthy otocinclus will have a round stomach. When they are pressed up against the glass, their white bellies should look like they’ve swallowed a pearl. Underfed fish will be light in color and might have a concave stomach.

Breeding

Oto catfish have been bred in the aquarium hobby, but not with large success or description. It is believed that they are very similar breeders and egg spawners to Corydoras.

Otocinclus breed by the male interlocking with and fertilizing the female’s eggs. The eggs are then deposited in a safe area with no further parental care.

There are a few described methods for successfully breeding these freshwater fish, though most of it comes down to creating ideal environmental conditions and providing a high-quality diet. Large, cool water changes are said to help encourage spawning as well as having other active spawning species in the aquarium, such as Corydoras.

There is a great video by Fins and Whiskers that explains breeding these fish. Check it out below.

The fry needs to be fed large amounts of algae and plant matter. They are extremely small and will need to be raised in a very controlled setting.

Final Thoughts

Otocinclus catfish care can be demanding. These fish need a mature aquarium with lots of live plants and biofilm to keep them protected and fed. Most otos in the fishkeeping hobby are wild-caught, making the transition from the wild to the home aquarium difficult. As a result, they’ll need to be given a careful diet with plenty of greens.

📘 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.

Female bettas are a topic I find genuinely fascinating — and one that I think gets too little attention in beginner guides. I’ve kept both males and females, and the dynamics of a female betta sorority tank are completely different from anything else in freshwater. They can work beautifully or fall apart fast depending on setup. This guide covers what you actually need to know to keep female bettas successfully, including whether a sorority is realistic for your situation.

Female bettas are genuinely interesting fish that most people overlook entirely — which is a shame, because a well-set-up betta sorority is one of the more dynamic community tanks you can build. I’ve kept bettas for years and I’ll be honest: a sorority tank is not a beginner project. Females can be just as aggressive toward each other as males, and if you set it up wrong you’ll end up with one dominant fish terrorizing the rest. But when done right — 5 or more females, heavy planting, lots of line-of-sight breaks — it works beautifully. This guide covers everything from solo female care to making the sorority work long-term.

Overview

Origin and Habitat

Betta fish are native to Thailand in Southeast Asia. They are found in shallow freshwater environments like swamps, marshes, and rice paddies.

The water in these systems stays warm throughout the year thanks to a climate where the air temperature ranges between about 59°F and 104°F. This warm water is usually full of plant life and small creatures that these fish feed on.

Female Betta Fish Appearance

Female betta fish usually don’t have the same long flowing fins as the male fish. The male betta fish have much larger pelvic fins in particular. There are always exceptions, however. Some male bettas have short fins, and some females can have pretty long fins.

Female bettas aren’t quite as colorful as the males either. Make no mistake though, female bettas can still have amazing colors! They come in a huge variety of colors too, from solid colors to patterns with many different shades.

Female vs Male – What’s The Difference?

There are some other differences between male and female bettas aside from their fins and colors. Let’s take a look at some of the most useful clues that you can use to tell the difference:

Physical differences:

• Female bettas have vertical bars or stripes on their bodies when they are in breeding condition.
• The body length of the female betta is shorter and wider across
• Female betta fish do not have the same ‘beard’ as the males. The beard is the membrane that these fish flare in territorial encounters.
• Females have an ovipositor tube that is called an egg spot.

Behavioral differences

• Female betta fish can still be aggressive. They are usually a little less aggressive than their male counterparts, however.
• You can keep female bettas with other female betta fish. Male bettas should never be kept with other males unless you have a large aquarium.

Female Colors & Breeds

Bettas have been kept and bred for hundreds of years and today there are many types of female betta fish to choose from. Male betta fish might be more colorful, but many female betta fish also have awesome colors and patterns!

Here are a few examples of the most popular types of female bettas in the hobby:

• Female halfmoon bettas
• Female veiltail bettas
• Female koi bettas
• Female crown tail betta

Average Size

Female bettas are small freshwater fish that reach a length of between 2 and 2.25 inches. The females are typically a little shorter than the males when fully grown. Their bodies are slightly wider across than males, however.

Care

Female betta fish can be really easy to care for! In fact, these fish are great for children or newcomers to the fish-keeping hobby. Keeping a single betta female in her own tank is the best bet for beginners, but more experienced fish keepers can even try keeping many females together in the same tank.

Are you ready to learn more about caring for female betta fish? Let’s dive right in!

Aquarium Setup

The right kind of aquarium is very important for successfully keeping female betta fish. In this section, we’ll take a look at how to set up an awesome female betta tank and discuss how to keep one or more of these beautiful fish.

Tank Size

Your choice of tank size depends on how many female bettas you plan to keep. If you’re just getting started in the aquarium hobby, a single female betta would make an awesome pet! You can keep your betta in a tank as small as 5 gallons, but a ten gallon would be great too, especially if you want to grow some neat plants and add other fish.

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You’ll need a much bigger tank if you plan on setting up a female betta sorority tank. 29 gallons or more would be perfect for this kind of setup.

Water Parameters

Maintaining the correct water parameters is very important for keeping your female betta fish healthy. You’ll need a thermometer and a water test kit to monitor your parameters.

Bettas are tropical fish, so make sure you have a heater to keep your water temperature stable between 76 and 82°F.

Bettas prefer neutral water, although slightly acidic or slightly alkaline water is acceptable. A pH of 6.5-8 is considered ideal. Moderate water hardness of between 5 and 20 dGH is best for these fish.

Filtration and Aeration

Contrary to popular belief, betta fish do need good filtration. A small sponge filter will be perfectly fine for a single specimen, but you’ll need a more powerful filter for a sorority setup.

A canister filter is an ideal choice for a betta sorority because it combines a large volume of filtration media with a low water flow. The fact that it is kept outside of the aquarium also means you’ll have a beautiful display tank.

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Betta fish are adapted to live in shallow still water systems where they do not need to fight against any water current. The female fish tend to be stronger swimmers than male fish but they will also struggle in a tank with strong water flow.

Bettas occur in pretty low oxygen, still water environments in nature, so they do not need an air pump with an air stone to stay healthy. Increasing aeration will not harm them, however.

Recommended Filters

• Sponge filter- This type of filter is great for single fish setups.
• Canister filter- These filters are perfect for community aquariums and betta sororities.
• Hang on back filter– HOB filters are a good all-around choice. Choose a model with an adjustable flow.
• Internal power filter – These filters tend to create quite a strong current which is not ideal. A small model with an adjustable flow rate and a spray bar to reduce the flow rate can be used, however.

Lighting

Any standard aquarium lighting consisting of either fluorescent or LED lighting would be ideal for your female betta fish. Your fish will be more confident if you keep the lighting fairly dim, but you’ll need good light if you are growing live plants.

Go ahead and set your lighting on a timer to run for 6-8 hours each day. This will provide your fish with a natural daylight period.

Here’s a very important lighting tip for beginners: Make sure your aquarium is not exposed to any direct sunlight near a window. Strong sunlight is like an invitation for algae!

Aquatic Plants & Decorations

Bettas come from shallow water environments that are full of aquatic plants, so these fish thrive in planted tanks. Live aquarium plants provide your female betta fish with several great benefits, but you can also use artificial plants to simplify your setup.

If you do go the plastic route, just make sure your decorations are aquarium-safe and don’t have any sharp edges that could tear your betta’s beautiful fins.

Bettas love hiding places, so they will love exploring and swimming through the leaves of plants. Amazon sword and other species that have large leaves make a great choice because bettas love to sleep on the leaves!

Some floating plants are also a good choice- just remember that bettas need to get to the surface to breathe.

Add some driftwood, rocks, and aquarium decorations to make your female betta fish tank even more natural and attractive. Bettas love cave decorations, but sunken ships and castles will also give your fish a great place to hide.

Tank Maintenance

Regular tank maintenance will keep your tank looking great and your female bettas healthy. An hour of your time every week or so for a water change is really all that you need to set aside to maintain great water quality.

You can start with a 25% water change once a week and adjust your maintenance schedule based on the nitrate levels in your tank. If your nitrate levels are getting much over 20 ppm before each water change, consider changing out a little more water.

You’ll need a few supplies to keep your female betta fish tank clean and healthy. Let’s take a quick look at what you’ll need and how to use them:

• Gravel vacuum- Use your gravel vacuum to suck dirt and waste from the bottom of your tank. This will keep your substrate clean and looking great.
• Aquarium water test kit – Use your aquarium test kit to monitor your water parameters regularly.
• Water conditioner – You should always treat tap water before adding it to your aquarium. Water conditioners neutralize harmful chemicals like chlorine and make the water safe for your fish.
• Algae scraper – Use your algae scraper to clean your aquarium glass when necessary.

Substrate

Any clean, aquarium-safe substrate can be used in your female betta fish aquarium. Sand or gravel in a color of your choice is ideal, just be sure to rinse the substrate thoroughly before adding it to your tank. Most freshwater fish look and feel their best in tanks with a darker substrate, but you can use your creativity and choose any color you like.

Use good quality aquarium soil if you plan on growing loads of aquarium plants. This is a more expensive option than regular gravel because it supplies all the nutrients that plants need to live and grow.

Tank Mates

You’ve probably heard that Siamese fighting fish are super aggressive and can’t be kept with other fish. The truth is that you can set up a betta community tank with other species or even keep more than one betta fish in the same tank as long as they are females.

You should never keep male and female bettas together, but you certainly can keep females with other female bettas in the right kind of tank. Adding a school of dither fish can help to distract your female betta fish and reduce aggression. The best dither fish are active smaller fish like harlequin rasboras that swim in the middle and top levels of the tank.

Here are some good tank mates to keep in a female betta fish community tank:

• Other female betta fish/ female Siamese fighting fish
• Harlequin rasboras
• Otocinclus catfish
• Corydoras catfish
• Khuli loaches
• Nerite snails

Incompatible Tank Mates

The following fish are not recommended for a female betta fish community aquarium:

• Tiger barbs
• Cichlids
• Goldfish
• Any aggressive, nippy, or predatory fish
• Male Siamese fighting fish/ male bettas
• Dwarf shrimp

Keeping a Single

The easiest way to keep female betta fish is to keep just a single female betta fish in its own tank. You can set up a great betta aquarium without spending much, so setting up a few different tanks is also a possibility.

Betta sorority

The great thing about female betta fish is that you can actually keep more than one in the same tank. This takes careful planning, however, and you’re going to want to have some backup plans in place in case anything goes wrong.

In a very large tank, a female betta fish sorority could do well if each has enough personal space. Growing Loads of tall aquarium plants and providing plenty of decorations can also help to keep the fish out of sight of one another. You can see a sorority in action from this tank in the video above by kingofhear4711.

Another completely different technique can be used to limit aggressive behavior. Purposefully overstocking the tank will prevent the female betta fish from developing territories and singling out any one fish to bully.

It is best to keep at least 6 female bettas in the same tank and keep a close eye on your fish, especially in the beginning. Any fish that is picking on the others may have to be removed from the tank.

This is where having a backup plan will really come in handy. I would recommend setting up a small tank that can be used as a hospital tank and for quarantining new fish. This little tank will come in handy eventually, even if you don’t have any fighting.

Breeding

Breeding betta fish at home is quite easy and can be great fun too. The most important thing to understand is that male betta fish can become aggressive and even kill the females if you don’t keep a close eye on things.

Let’s run through the basic steps of breeding betta fish.

• Your male and female bettas should be kept in separate tanks until they are ready to breed.
• Set up and cycle your breeding tank well before you start breeding your bettas.
• Condition your fish by feeding them live foods.
• Introduce your fish to the breeding tank but keep them separated with a divider.
• After a day or so, the male will have built his bubble nest and the pair can be allowed to spawn.
• The pair will embrace and the female will drop her eggs. She can be moved back to her own tank once the eggs are laid.
• The male will collect the eggs and deposit them in the bubble nest.
• The eggs will hatch after a few days and the male can then be moved back to his tank.
• Feed the baby bettas a diet of tiny food like infusoria for about 2 months until they are ready to be moved into their own tanks.

Breeding Tank Requirements

Now that you have a better understanding of the betta breeding process, let’s take a look at the recommended breeding tank setup:

A tank that holds ten gallons or so is a good size for breeding betta fish. You’ll need a small heater and a sponge filter that creates a very low flow to maintain good water quality for the baby bettas. You only need 5 inches or so of water in the tank, and you don’t need a light or any gravel or substrate.

Add an Indian almond leaf or a piece of floating foam to the tank to give the male a place to build his bubble nest. Finally, lay a sheet of plastic wrap over the top of the tank to maintain humid air above the water.

Food & Diet

Female bettas need a high protein diet consisting of prepared dried foods and live/frozen foods. They can be fed the same diet as their male counterparts.

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A high-quality floating micro-pellet or flake food is the best daily food source for female bettas, but you should supplement this a few times a week with some live or frozen foods like brine shrimp and bloodworms. These supplements will bring out the best color and condition in your fish.

How Often Should You feed them?

You can feed your betta fish once or twice per day. Pick one day per week to fast your fish as this can help prevent the chance of bloating. Don’t worry, your fish can survive for many days without food so just one day won’t do any harm.

Overfeeding can be very dangerous for your betta and excess food can cause the water quality in your aquarium to deteriorate. Feed your betta only as much as it can finish in a minute or so and remove the leftovers from the tank.

Common Health Problems and Diseases

Female betta fish are vulnerable to a variety of common fish diseases. Keeping them in a healthy tank with great water quality is the best way to avoid problems.

Follow these steps to prevent illness:

• Quarantine your fish before adding them to a community or sorority tank.
• Make sure your pH, water hardness, and water temperature are in the right range.
• Feed your fish a healthy, balanced diet.
• Keep up with regular tank maintenance.
• Separate fighting fish. Stress is the biggest cause of illness in bettas.

Let’s take a quick look at some of the more common problems that affect betta fish:

Ich

This common freshwater fish disease is characterized by white spots on the fish’s body. Ich is caused by a parasite and can be treated with medication like Ich X.

Swim Bladder Disorder

Swim bladder disorders cause fish to struggle to swim properly. They may sink, float or spin in the water. This illness is often caused by overfeeding bettas.

Fin Rot/Tail Rot

Torn and disintegrating fins are a common symptom of stressed betta fish. Fin rot can be treated with antibiotics or aquarium salt.

FAQS

Final Thoughts

Female betta fish deserve more credit than they get in the hobby. These tropical fish make amazing pets for everyone from beginners right up to experts! If you’re new to fish keeping, a single female betta is the perfect first fish for you. If you’re a more experienced aquarist, however, a betta sorority tank could make a great new project.

Do you keep female betta fish? Tell us about 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.

Pea puffers are one of my favorite fish to talk about — they’re tiny, but the personality packed into that little body is remarkable. I’ve seen pea puffers in community setups and solo tanks, and there’s a real art to keeping them well. They’re not for everyone, but if you give them the right environment they’re endlessly entertaining. Here’s my complete care guide based on real experience with these little fish.

Pea puffers are one of those fish that punch way above their weight class — at under an inch, they have enormous personality, aggressive feeding responses, and a territorial streak that surprises most new keepers. I love them for nano tanks because they’re genuinely interactive fish that recognize their owners, but you have to understand what you’re working with: they’re fin nippers, they need live or frozen food to thrive, and their tank mate options are very limited. After 25+ years in the hobby, here’s what you actually need to know to keep them successfully.

Species Overview

Origin and Habitat

Pea puffers are a type of freshwater pufferfish, one of about 30 different fish species to exist in the world. They originate from very specific locations throughout the state of Kerala in India. There, these fish are found in highly vegetated and slow-moving freshwater streams and rivers.

Due to their size, they are unable to navigate waterways with higher water currents and take safety in numbers and natural shade. Though highly territorial, dwarf pea puffers can usually be found in groups, investigating their surroundings and defending their homes.

Unfortunately, their limited natural habitat is threatened due to pollution and deforestation. On top of dwindling numbers partly caused by aquarium trade collection, the pea puffer has been listed as a vulnerable species according to the IUCN Red List of Threatened Species as of 2010¹.

Luckily, pea puffers have been successfully bred at the commercial level, leading to more sustainable methods of distribution. Still, some wild-caught specimens make their way into the market.

Appearance

There is arguably no other fish as cute as the pea puffer. These fish are lucky to reach 1 inch at mature size. They have a pointed head and tail with a plump belly that looks like they really might have swallowed a whole pea!

Pea puffers are yellowish-green in color with a lighter belly. They have several brownish-black spots with many pinpoint speckles as well. One of the most adorable features of these dwarf pufferfish is their two large eyes that stare at anything and everything with wild fascination and joy.

It is impossible to tell a male pea puffer apart from a female while they are juveniles. As we’ll see, this can lead to some aggressive behavior in the future.

In general, male pea puffers are much darker and more intense in color; their stomachs will be yellower and their spots will be more pronounced. Most notably, males will have a black stripe that runs along the top of their belly and iridescent swirls in their eyes. In contrast, a female pea puffer will lack both the stripe and iridescence but will be larger and much plumper overall.

A bigger difference between males and females is their level of aggression. Despite their size, pea puffers can be especially territorial and aggressive. Males are considerably more aggressive than females, but will these fish bite you if you put your hand in the tank?

Pufferfish are inquisitive and eager fish. Fish hobbyists love both freshwater and marine species of pufferfish due to their bold and curious personalities. Many times, pufferfish keepers are greeted by their fish chomping away at the surface of the water when it’s time to eat; tongs often become the most preferred way of feeding these fish.

On the other hand, some puffers allow their owners to pet them! We do not recommend this as this can potentially injure or disrupt the natural slime coat of the fish.

Like many other animals, pufferfish become toxic due to their diet. In particular, pufferfish need to consume specific bacteria and algae that grow on the shells of mollusks in order to produce a toxin. These poisons accumulate in the organs of these fish, which then poison and potentially kill whatever larger predator comes along and eats the puffer.

Even in the wild, it is rare to find a pea puffer that has toxins present in its organs. Needless to say, the majority of pea puffers available in the aquarium hobby are not toxic and are harmless. This should not be tested by humans or other fish that can eat your puffers, though!

Care Guide

Pea puffers are some of the smallest fish available in the aquarium hobby. They don’t need a lot of space, but oftentimes bring more excitement than the largest aquarium setups!

On top of that, a dwarf pea puffer aquarium is easy to assemble and maintenance is relatively straightforward. However, their aggression, dietary needs, and tank mate limitations prevent this predatory species from being one of the most popular fish in the hobby.

Although pea puffers are nearly irresistible, they require some special care that not all hobbyists are ready to give. Pea puffer owners need to be ready to respond to potential aggressive behavior while catering to a carnivorous diet in a species-only aquarium.

At the same time, pea puffers are one of the best introductory species of pufferfish to keep. They are small fish that can be kept in small tanks whereas most other pufferfish can only be kept by themselves in very large systems. Financially, they are also one of the cheapest species of pufferfish to keep with individuals ranging from $3-15.

On top of that, pea puffers have very slow-growing teeth that do not need to be manually trimmed like other species with larger and faster-growing teeth. As long as hard foods are fed every now and then, you will never need to take care of your pea puffer’s teeth.

Aquarium Setup

Pea puffers are considered a nano fish species. However, a nano tank setup will only work if the layout caters to their aggressive behavior. This is why the minimum tank size for a pea puffer can vary depending on the number of aquarium plants and structures provided.

Tank Size

Being a nano fish, a pea puffer will gladly live in aquariums under 20 gallons. In fact, a single pea puffer can comfortably be kept in a 5 gallon tank as long as there are enough hiding spots and water quality is maintained. The best size for a pea puffer tank is 10 gallons. This allows at least 2 to 3 puffers with plenty of room for your fish to explore.

Even though 10 gallons might seem small, it can seem like a lot of wasted space when these fish are only an inch big. It can be very tempting to add other fish or more pea puffers. However small, pea puffers need space to claim territory and exercise and the tank should not be overstocked.

Water Parameters

Pea puffers aren’t the hardiest fish, but they don’t demand super-specific water parameters either; like other fish, poor water quality will affect pea puffers over time.

In all regards, pea puffers prefer neutral water parameters. This means 0 ppm ammonia, 0 ppm nitrite, and minimal nitrates. Water temperature must remain between 72° – 82° F; anything above or below this range will cause your fish to stress out. Water pH should also remain near neutral, between 6.5 and 8.0.

Though these fish might seem like they’re scaleless, they actually have scales that have a skin-like texture. This makes them a little hardier than other sensitive fish, though water quality still needs to be maintained through weekly or biweekly water changes.

Filtration and Aeration

Pea puffers do not tolerate water flow well. These fish come from waters that are near standstill conditions and cannot swim against a moderate current produced by a filter or other aeration equipment.

That being said, a pea puffer setup needs good filtration as these fish are messy eaters. Most equipment will need to be baffled to keep water flow to a minimum; some intake valves may also need to be covered to prevent these little fish from being sucked up.

Water with little flow will suffer from low gas exchange. This can cause some concern in regards to dissolved oxygen levels. An air stone with an adjustable rate may be added, though live plants are the preferred method for naturally introducing oxygen into the water column.

Plants & Lighting

Pea pufferfish prefer dim lighting. This becomes a problem though as they also prefer heavily planted aquariums that depend on higher lighting intensities. There are a few ways to combat this balance between preferred dim lighting and the lighting required to keep aquarium plants growing.

The best way to get a balance between high and low lighting is by creating dynamics in the tank: some areas with very intense lighting and other shaded areas where your fish can seek refuge. This can be done by using floating plants, like duckweed (Lemna minor) or water lettuce (Pistia stratiotes).

Populations of floating plants will need to be controlled as they can quickly block out all available light. Dispersion can also be controlled by using floating sectioning tools specifically designed to keep floating plants exactly where you want them.

Another option is to create different sections of the tank based on plant density and species. Simply plant taller plants in one area and shorter plants in another. This can create a background, midground, and foreground effect with plants depending on different light intensities.

Another option is to go completely low-tech and only plant undemanding species. This will still provide your fish with dimmed lighting and a heavily planted aquascape. Some ideal choices would be Anubias spp., Cryptocoryne spp., hornwort (Ceratophylum demersum), and moneywort (Bocapa monnieri).

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In addition to plants, driftwood, rocks, and other artificial decorations may be used to add additional dimmed hiding spots throughout the tank.

If you notice that your fish is hiding in the shaded areas of your tank, then the lighting might be too intense. Try lowering the intensity of the light, adding more live plants, or adding more hiding spots.

Substrate

Again, the substrate should benefit the plants in the aquarium. Unlike other pufferfish, you do not need to worry about your pea puffer rearranging the plants and decorations in your aquarium. This allows for both gravel and sand substrate options.

In general, pea puffers look best on a fine sand substrate, though coarse sand or gravel will facilitate plant growth better. A layer of leaf litter may be added to make the tank look more natural.

Tank Maintenance

Pea puffer tank maintenance is straightforward. Perform 25% weekly or biweekly water changes depending on water quality. Keep the substrate vacuumed as minimal water flow can lead to detritus and waste build-up.

Because these fish prefer densely planted aquariums, many hobbyists choose to dose fertilizers. The frequency and amounts of fertilizer will depend on each individual system. For the most control and cost-efficient method, use dry fertilizer powders. Liquid fertilizers are the most convenient

Tank Mates

Unfortunately, pea puffers do best when kept as the only species in the aquarium. Though small, these freshwater fish can be aggressive towards each other and other tank mates. As it is, some fishkeepers already have problems diffusing aggression between male puffers.

The trick to getting a peaceful pea puffer tank is having a good balance of males and females; there should be at least 2 to 3 females for every male pea puffer. This will keep the male from harassing the females too much.

Community Tank Mates

Pea puffer tank mates are limited, though there are some options that have proven to be successful. Of course, the best tank mates will be other pea puffers but there are some fish that stay out of the way of the pea puffer.

These include:

• Otocinclus catfish
• Danios
• Kuhli loaches
• Tetras

Tank mates should be fast and protected in a group. It is especially important to pick fish that swim at other levels of the water column, like the top and bottom, where your pea puffers don’t regularly stay.

Food and Diet

It’s no secret that pufferfish are some of the most fun fish to feed in all of the aquarium hobby. These adorable fish will gladly munch down on anything you give them, though they need a carnivorous diet to thrive. This can become costly over time and not all hobbyists are able to meet the dietary needs that come along with pea puffer care.

As mentioned before, pea puffers have slow-growing teeth. This means that they don’t heavily rely on hard foods to trim their teeth like other species. Instead, they can be kept on a live, frozen foods, and freeze-dried diet.

Pea puffers will enjoy an assortment of meaty foods, including brine shrimp, worms, and mollusks. They can be given fresh seafood and will enjoy eating pest snails, like ramshorn snails, from another tank. Pea pufferfish will not accept dry foods, like freshwater fish food flakes or pellets, making them slightly more challenging and expensive to keep.

Breeding

Pea puffers are not easy fish to breed, though they are now bred successfully at the commercial level. It is easy to make these small fish happy, but difficult to make them spawn.

The key to breeding these tiny fish is providing them with algae or moss. In the wild, these fish naturally spawn in mats of algae and moss, which can be recreated with some Java moss ( Vesicularia dubyana) in the aquarium setting.

Keep a group of females with a couple of males. Keep them well-fed while maintaining water quality. A dedicated breeding tank isn’t necessary as chances increase when more females are available. If successful, a clutch of eggs will be laid and fertilized in the given moss.

The eggs will hatch within a couple of weeks. Raising the fry is difficult as they need to be given incredibly small foods, like paramecia and infusoria. For the best results, they should be moved to their own separate tank that is free of predators and powerful aquarium equipment. Once they are large enough to accept larger, meatier foods, their chances of survival increase significantly.

At the same time, some hobbyists have had their pea puffers spawn without any intervention other than being given a suitable substrate. Each clutch can raise anywhere from 1 to 40 pea puffers.

Final Thoughts

Pea puffers are adorable fish that don’t need a lot of space. However, they can be pretty aggressive and need to be given a specific diet that not all hobbyists can provide. If tank conditions are met, then they could potentially spawn on their own in the aquarium.

For the most part, these freshwater fish make for a great species-only aquarium, though some hobbyists have made other tropical fish work as tank mates as well!

If someone asks me for a beginner-proof schooling fish, white cloud minnows are near the top of my list every time. They’re hardy, peaceful, and one of the few freshwater fish that actually prefer cooler temperatures — which means many hobbyists can keep them without a heater. They get overlooked because they’re not as flashy as neon tetras, but they’re significantly more resilient and honestly more interesting once you have a school of them swimming together. Here’s everything you need to know to keep them well.

Species Overview

What Are White Cloud Mountain Minnows?

The white cloud fish or the white cloud minnows (Poor man’s neon tetra) are tropical fish that are ideal for beginners. They were first discovered in China around 1930 and ever since they have instantly gained popularity in the freshwater aquarium industry.

White cloud minnows belong to the family Cyprinidae of the Carp family which are cold water fish. Easy to care for and extremely hardy fish that require little maintenance. White clouds are considered a schooling fish. Hence, keep them in a group of five or more, otherwise, they will stress out and fade their vibrant color.

Origin and Habitat

The natural habitat of white cloud mountain minnows is the streams of Guangzhou’s Baiyun (White Cloud) Mountain, where they were discovered. The water of these streams is clear and slightly acidic and the flow is low to moderate. This is a cold water fish that prefer low water temperature. However, in their natural habitat, they are almost extinct as stated by the Chinese government.

Appearance

The white cloud minnows are tropical fish that are small in size with dart-shaped bodies and pointed snouts. The bodies of these freshwater fish are slim and streamlined with their dorsal fin and ventral fins; triangular and pointing towards their bodies’ back. The upper part of the body is wider than the lower part, i.e., the tail with a soft-pointed snout.

The triangular ventral and dorsal fin showcases hues of red and white on the edges. However, there are a few parts of the fin that are entirely transparent.

The dominant color on white cloud minnows is soft brown which looks like a glistering bronze with a few hints of green here and there. The central part of their body possesses a horizontal line that follows the lateral line. This horizontal stripe is pink or white in color.

Different Types

There are two major varieties of white cloud mountain minnows.

Meteor Minnow or The Long Finned Variety

The meteor minnows are the long-finned variety of Tanichthys albonubes or the white cloud mountain minnow with noticeably long and flowy fins in the adults (video source).

The long fins of meteor minnows are reddish in color, flowing behind them as they swim. This variety of cloud mountain minnows is more desirable because it has a beautiful overall appearance with a contrast between metallic scales and vibrant fin patches.

Apart from the fins and other differences, the meteor minnows are exactly the same as standard white cloud mountain minnows in other aspects.

Golden Cloud or The Gold White Cloud Mountain Variety

If you see a minnow with a striking deep gold color, know that it’s a golden cloud mountain minnow. These fish species fall under the same scientific name, Tanichthys albonubes. Thus, an alluring variety of the white cloud mountain minnow. Like the Meteor minnow variety, the golden cloud also possesses red patches on the fin that pose a striking contrast with their classic gold color.

The female golden cloud mountain minnow has a pale white patch on their bellies, whereas, the male golden cloud lacks it.

Lifespan

In captivity, the life expectancy of white cloud mountain minnows is around five to seven years, provided that the water condition is optimal and within the suitable temperature. It is imperative to keep these aquarium fish in cooler waters as they are cold water fish that significantly lose their health and reduce their lifespan if kept in warmer temperatures.

Average Size

The average adult size of a white cloud mountain minnow is approximately around an inch and a half in length. Like other minnows, the white cloud mountain minnow is also a very small fish that thrive in a small fish tank.

Fun fact: The white cloud mountain minnows rose to fame during the 1940s and 1950s. And during the period, they were more reasonably priced than other fish. That's the reason they are called Poor man's neon tetra because they were much more affordable than the expensive fish in the market. To date, despite having no relation to Danio breeds, white cloud minnows are sold by the names of Cardinal fish, Canton, and China Danio.

Care

Unlike other fish with genetic variation, the white cloud mountain minnow is hardy species that are excellent to keep as pets for beginners. They are cold water fish but due to their super flexible nature, white cloud minnows are known to thrive in different conditions.

However, some things should be taken into consideration to keep them happy and thriving in your home aquariums.

Aquarium Setup

White cloud mountain minnows are freshwater, peaceful fish that grow no longer than 1.5 inches. The best part is it’s a schooling fish that enjoys the company of other fish such as Siamese fighting fish (Betta fish), Guppies, Rummy nose tetras, etc. And because of their shoaling nature, I suggest keeping them at least in a group of six fishes that are not aggressive and equal to the size of your white cloud minnow.

Also, these fish thrive in the top and middle levels of the tank and rarely move to the bottom of the tank. Therefore, avoid floating plants that may cause a hindrance in their daily activities.

Tank Size

While going for a tank for community fish, bigger is always better. However, as far as the white cloud mountain minnows are concerned, they thrive in at least 10 to 12 gallons tanks which can accommodate a school of around six fish easily.

However, if you want to keep more species in a community tank, aim for a bigger tank to provide them with lots of space for free swimming.

Water Parameters

Despite being a cold water fish, white cloud minnows are flexible when it comes to water temperature. They can survive in as low as 4°F and can function well in the 64-72 °F range. Due to this, you can easily keep them in unheated aquariums and fish bowls. Also, if you’re in places where the temperature is slightly lower than the recommended range, your white cloud mountain minnow will be a very comfortable and active fish.

The recommended pH level for the white cloud mountain minnow tank is around 6.0 to 8.0 and on a slightly acidic side with a water column moderate to low.

Filtration and Aeration

The white cloud mountain minnow is sensitive to water quality. Therefore, keep an eye on the traces of Chlorine and Chloramine. Avoid it altogether by using a tap water conditioner. Seachem Prime is what I usually use. Also, I suggest avoiding extremes of pH and hard water for their healthy survival. In white cloud mountain minnows, the copper tolerance is zero. Therefore, make sure to eliminate copper traces from your aquarium, if any.

For moderate flow, consider a power filter or purchasing a canister filter and limiting the flow on the return side.

Lighting

Though white cloud mountain minnow does just fine without tank lights, installing high-quality, adjustable tank lights make a huge difference.

First of all, if you want your white cloud minnows to distinguish between day and night, which is essential for breeding, you need to install a tank light. Secondly, the lights in your tank keep your aquatic plant healthy. Thirdly, the tank lights help you monitor the overall health of your fish. Thus, lighting is important. However, the intensity of the light should be taken into consideration.

White cloud mountain minnow appreciates subtly lit tanks, which also helps the color of your fish pop. I suggest installing an adjustable LED light in your aquarium tank with an automatic timer that turns off automatically during night hours.

Aquatic Plants and Decorations

The natural environment of white cloud mountain minnows in freshwater streams and rivers comprises several live plants. And so, adding live plants to your aquarium tank is a must. I suggest keeping plants like dwarf rotala and water sprite. Avoid keeping floating plants in your tank as they may hinder their view, provided that white cloud minnows occupy the top and middle level of the tank.

Live plants in the aquarium provide your minnows with a safe place in a form of shelter. Some great examples of live plants are Hornwort, Pondweed, and Duckweed.

The decorations should also constitute a significant part of your tank because the white cloud minnow is an active fish that like to move and hide in a few places here and there. Driftwoods, rocks, and caves should be added to your tank to make your aquarium worthwhile for minnows. You can also add rocks or other ornaments to give your tank an interesting look.

I don’t recommend adding floating plants. However, if you must, invest in those plants that don’t obstruct your minnows from free swimming near the top or middle of the tank.

Tank Maintenance

When it comes to cleaning, even the hardiest fish won’t compromise. So why should your beloved white cloud mountain minnow?

White cloud minnows are vulnerable to toxins such as Ammonia, Copper, Chlorine, and Chloramine. Therefore, proper cleaning and filtration are imperative to increase their life expectancy and improve their overall health,

I recommended cleaning the filter at least once a month to maintain a healthy ecosystem.

Pro Tips:

1. Cycle your tank entirely to avoid toxic buildups of nitrogen and ammonia in your tank
2. A minimum of 15% of the water should be replaced every week
3. Maintain the water temperature, pH levels, and hardness of water to keep your tank conditions optimal

Substrate

While white cloud mountain minnows spend most of their time at the top or middle of your tank, it’s still important to pay special attention to the substrate. 

White cloud mountain minnows enjoy a variety of substrates, ranging from sand, gravel, pebbles, or rocks. I recommend getting a dark-colored sand and gravel mixture to complement the beautiful colors of your cloud minnows. Make sure to get the gravel large enough so your fish can’t swallow it and choke.

Community Tank Mates

If you’re introducing your white cloud mountain minnows for the first time in an aquarium, I suggest adding them in groups of at least six to avoid stressful behavior. Also, make sure to add them with even-tempered fish to avoid conflicts. 

The best community tank mates for white cloud mountain minnows are:

1. Rosy barbs
2. Guppies
3. Endlers Livebearers
4. Pristella Tetras
5. Rummy Nose Tetras
6. Harlequin Rasboras
7. Scissortail Rasboras
8. Lemon Tetras
9. Black Widow Tetras
10. Emperor Tetras
11. Head and Tail Light Tetras
12. Glass Bloodfin Tetras
13. Swordtails, Platies
14. Mollies
15. Zebra Danios
16. Glowlight Tetras
17. Cherry Barbs 
18. Corydoras catfish, e.g., Peppered catfish
19. Paradise fish

Incompatible Tank Mates

Avoid all large and aggressive fish that might end up swallowing your white cloud mountain minnows.

Some incompatible tank mates for white cloud mountain minnows are:

1. Most Cichlids
2. Tiger barbs
3. Paraguay
4. Buenos Aires Tetras
5. Colombian Tetras

Many people consider small goldfish to be a great tank mate for white cloud minnows. However, I don’t recommend keeping goldfish and white cloud mountain minnows together, as goldfish will eventually prey on your white minnows.

Breeding

White cloud mountain minnow reaches maturity around six to twelve months, and the process before breeding is a beautiful sight to behold.

Adult white cloud mountain minnows flare their fins and perform a ritual dance, attracting the females. It’s a kind of competition for males to outperform each other, winning the females during the mating cycle. During this process, males can nip at one another to show minor aggression, but this aggression doesn’t lead to serious skirmish. 

When it comes to breeding, the white cloud mountain minnows are the easiest fish species to breed without any difficulty even if you’re a novice breeder. Since white cloud minnows are egg scatterers (lays eggs throughout the year), it’s easy to breed them in any season. 

The best part about breeding these incredible species is you don’t necessarily need a separate breeding tank for your white minnows. Keep them in their standard tank with clumps of aquatic plants and a spawning mop where your fish can easily scatter their eggs. Make sure to keep the pH level, hardness, and temperature level in an optimal range. After the eggs are fertilized, the fry doesn’t need their parents’ help.

Even though unnecessary, I suggest spawning your white minnows in a separate breeding tank to protect the newly hatched fry from quickly becoming food. For a breeding tank, you need a tank as small as 5 gallons that safely accommodates a single adult pair. But since there’s no issue of male aggression in mountain minnows, you can keep two or three males together. Keep the temperature, pH levels, and water hardness within optimal limits. I also suggest adding java mass as a spawning channel.

During spawning, females lay eggs that will hatch in around two days. After the eggs are fertilized, they don’t need parental care and guidance and can be seen swimming freely in the water. It’s recommended to feed infusoria or luqifry to the newly hatched fry.

After the fry is around a week old, you can feed them baby brine shrimp or crushed fish flakes of high-quality flake food. The fry will reach 1/2 inch in less than four months, and reach their full potential size within a year.

Food and Diet

In their native habitat, white cloud mountain minnows are carnivorous. Their primary diet includes small insect larvae, worms, and crustaceans. However, in captivity, the same species are omnivorous that happily accept a varied diet, including vegetation and green algae in the water. But in order to keep their colors bright and shimmery, you need to feed them high-quality protein content as in flake or pellet food to improve their overall health and ensure longevity.

Besides, small insect larvae, white cloud mountain minnows eat mosquito larvae and daphnia fondly.

How Often Should You Feed Them?

Don’t be fooled by their tiny size. White cloud mountain minnows, despite being small fish, have big appetites. It’s recommended to feed them two or three times a day. However, since their stomachs are tiny, avoid overfeeding them or it will create health issues.

Common Health Problems and Diseases

Even though a hardy fish, white cloud mountain minnows can also experience some common health problems and diseases like most fish, including ich, dropsy, and fin rot.

However, the most common disease in white cloud mountain minnows is streptococcal infections.

Streptococcal Infection

This is a type of infection caused by bacteria. The symptoms of this disease are:

1. Fish swimming erratically
2. Inability to hold itself towards the water surface
3. Sinking down to the bottom of the tank

The causes of strep infections are mainly unhygienic conditions of the tank. To keep your fish away from health issues and diseases, change the water regularly ad install a foolproof filtration system. Also, be careful about the temperature range.

Differences Between Male and Female

If you have a problem differentiating between male and female white cloud minnows, remember—males are thinner than females with slender bodies. Also, the colors are more vivid in males than in females. Male white clouds show hues of red around their fins and mouth area and the nature is quite aggressive as compared to females.

On the other hand, females are usually round in shape and possess no red hints whatsoever.

FAQs

Final Thoughts

The white cloud minnow is a peaceful freshwater fish that is both; beautiful and hardy. They are small fish that need a minimum tank size of no larger than 10 to 15 gallons stocked with aquatic live plants and decorations.

The only requirement to keep them thriving and happy is a clean tank and nutritious diet that promote their healthy color, and immune system, and increase their life expectancy.

📘 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.

In 25+ years of keeping bettas, I’ve been asked this question more times than I can count — and the honest answer is: it depends. A betta will absolutely eat a small cherry shrimp if it can catch one. But pair that same betta with a tank full of dense plants and some larger amano shrimp, and they can coexist just fine. I’ve kept both successfully and unsuccessfully, and in this guide I’ll share exactly what makes the difference.

In my previous article, I shared the best tank mates for the betta fish, and many novice betta keepers wondered, “Will Bettas eat shrimp?” And so, in this article, I will answer this question.

Will Bettas Eat Shrimp?

Betta fish or the Siamese fighting fish is a popular species of freshwater aquarium fish that are famous for its ethereal fins and flamboyant colors. However, anyone that owns a betta fish, knows that they are quite aggressive towards other fish species. That’s the main reason, betta fish is popularly used for fish fights. But, their aggressive nature has made aquarists think, “Can betta fish live with shrimp?”

The answer is a yes and a no, both. I’ll go into further detail in our blog and have included a video from our official YouTube channel just for you. Bettas will attempt to eat shrimp that are small. There are larger shrimp like bamboos that can coexist. Let’s go into further detail starting with your Betta’s behavior.

Behavior

Bettas are voracious eaters that are also carnivorous. It means betta fish is fond of live food, whatever is available to them. Betta fish won’t even spare their sick or injured tank mates. Therefore, adding shrimp and bettas in the same tank might seem way too adventurous.

Therefore, in this article, I’ll list all the compatible shrimps for your betta fish in the same tank.

Best Companions

Bettas are known to prey on most freshwater shrimp such as cherry shrimp, ghost shrimp, crystal red shrimp, bumblebee shrimp, and other baby shrimp that are an easy catch for your betta fish.

Therefore, not every shrimp is compatible with your betta fish. When choosing a perfect shrimp for your betta tank, always notice the size of your shrimp. Smaller shrimp tend to be the favorite prey for your betta fish. Thus, choose a shrimp that is exactly the same size as your betta fish, if not bigger.

Cherries

The riskiest type of shrimp in your betta tank would be cherry shrimp. That’s because they are small in size with the female cherry shrimp growing about only a foot in length while males tend to grow a bit larger. Either way, the chances of your cherry shrimp being eaten by your betta fish are always very high.

But what if, even after all these warnings, you want to keep your betta fish and red shrimp together? Well, fortunately, you can. And if you think your bettas will get along with the cherry shrimp, the first thing you should do is introduce them to the tank.

Here are some tips to get your bettas and cherry shrimp to live together.

Make sure your fish are already living together

If your betta fish has never been introduced to a shrimp, chances are they will attack them right away.

Thus, in order to keep them in harmony, I suggest getting a betta fish that already lives with shrimp and other small fish. This way it will act less territorial and aggressive towards the poor shrimp and make great tank mates for your shrimp.

Provide them with lots of hiding places

The most important thing you should do to kill the territorial behavior of your betta fish is to provide it with ample hiding places. Make use of driftwood, caves, and java moss, where your bettas can feel secure and be less aggressive.

Get a big fish tank

Keep your cherry shrimp out of your bettas sight by providing a tank big enough for them to swim freely. If you intend to keep your cherry shrimp and bettas together, I suggest getting a tank no smaller than 20 gallons.

Introduce the cherry shrimp first in the fish tank

When you put another creature in a betta tank, it’s natural for them to feel like their territory has been invaded. And as a response, they might brutally attack your cherry shrimp.

To administer this, I suggest introducing the cherry shrimp first in your betta tank.

Amanos

Amano shrimp can make excellent tank mates for betta because they can reach a length of over 1 inch with an average lifespan of two to three years, unlike cherry shrimp. Amano shrimp also showcase dull colors that don’t pique your bettas to attack them aggressively.

However, consider the following points before adding Amano shrimps to your betta tank.

The temperament of your bettas

If your betta fish has shown aggressive and territorial behavior (like the video below) in the past few days, it’s highly likely that it will attack the Amano shrimp as well. Thus, if your betta has never lived with a tank mate before, refrain from adding Amano shrimps as they are quite costly. If you must, adding ghost shrimp is a great option because they are reasonable and used as feeder shrimp anyway.

The size of Amano Variety

Shrimp species are naturally smaller in size than the betta fish. So, it’s natural for a betta to attack smaller shrimp. Not because they are territorial, but shrimp serves as food for your bettas.

To cater to this problem, consider the size of your shrimp before adding it to your tank. In this regard, Amano shrimp species are an excellent choice as they are large and dull in color.

When looking for an Amano shrimp from the store, I suggest asking the clerk about the largest Amano shrimp possible to add to your betta tank.

Author Note: Look out for the female Amano shrimp as they are larger than the male shrimps

Ghost Variety

If you’re planning to introduce shrimp species in your betta tank for the first time, then ghost shrimp is your best bet. Because:

1. Betta fish is smaller than ghost shrimp
2. Ghost shrimp is used as a feeder shrimp anyway.
3. They are cheap and easily available everywhere
4. Ghost shrimp pose no potential threat to your bettas

Therefore, shrimp can live with bettas comfortably. However, there are chances that your betta will eat ghost shrimp. Thus, if you’re planning to introduce shrimp as tank mates for your betta, do this:

Add plenty of hiding places in your tank

Ghost shrimp, by nature, is very skittish. Therefore, in order to provide them with a safe place, add lots of aquatic plants, driftwoods, rocks, caves, and other aquatic ornaments.

The safer your ghost shrimp feel, the more it will explore the tank and come out.

Invest in a bigger tank

At least a 10-gallon tank would suffice the requirements of your ghost shrimp and betta together. Because betta eats ghost shrimp when it’s frustrating seeing your shrimp everywhere. The more space they have, the less interaction they make. And it results in an overall peaceful, friendly tank environment.

Also, a bigger tank provides more space for your ghost shrimp, in case it wants to escape the betta aggression.

Keep them well-fed

I’ve observed that betta and ghost shrimp live together in harmony, but there are cases when your betta will end up eating the ghost shrimp. Therefore, adding shrimp as a tank mate for your betta is quite risky. But you can do little effort to avoid the casualties.

Before introducing ghost shrimp in your betta tank, I suggest feeding your betta beforehand. That’s because betta eats ghost shrimps when they are hungry.

How many ghost shrimps should be kept in a tank?

Ghost shrimps are known to be happy around other shrimps. Therefore, to keep them happy and healthy, it is recommended to add at least two to four shrimp to a tank.

When you’re adding shrimp, avoid ghost shrimp babies as they are more likely to be attacked by your bettas.

The Best Species For Your Tank

I’ve discussed almost all types of shrimp species compatible with your Siamese fighting fish. However, there are one species that ticks all the boxes for the best shrimp and betta tank mate.

Bamboo or the Wood Species

Bamboo or wood shrimp is a freshwater shrimp species that are native to Southeast Asia. These shrimp species make excellent tank mates for your bettas fish. Since they are docile, healthy, active, and of different sizes, they are really fun to keep as betta tank mates.

Bamboo shrimp can come in small, medium, and large sizes, depending on your needs. The best thing about these shrimp is you can get them at any store, either your local store or chain stores. However, before buying, inspect the shrimp thoroughly—the legs, antennae, and eyes should be healthy.

The other reason bamboo shrimp is great for your betta is that they have soft exoskeletons that break down easily, in case your bettas eat any of them.

Here are a few things you should keep in mind before adding bamboo shrimp to your tank.

Adding lots of live plants

Bamboo shrimp appreciates enough live aquarium plants to provide them with places to climb on and hide under. Also, they admire other hiding places such as rocks and driftwoods.

The bigger the tank size, the better

The bamboo shrimp is a filter-feeding shrimp. It means that it pulls food from the water column. Therefore, to increase water volume, the size of the tank should be enough to support bamboo shrimp’s food needs.

I recommend getting a tank of 20 gallons or more to suffice the needs of your bamboo shrimp.

Fish Food

When it comes to feeding betta fish and shrimp, all you need to think about is betta food. Because shrimp is a scavenger for food. It will eat everything provided to it. Thus, when you provide your betta with high-quality nutritious food, know that your shrimp is well-fed with whatever you feed your bettas, either vegetables or meat. Bettas are carnivores and voracious eaters, so they need a high-protein diet that includes live, frozen, and freeze-dried foods, and sinking pellets.

However, this doesn’t imply that you completely ignore your shrimp in terms of food. Because as compared to a hungry betta, shrimp are slow eaters and may be left behind. So, I suggest feeding your shrimp a varied diet from time to time.

Difference Between Male and Female Bettas

When it comes to shrimp, there is no difference between a male and female betta as they both can get aggressive around small shrimp. However, the biggest shrimp is out of the league of your bettas because it cannot fit in their mouth. For this reason, dwarf shrimp species such as African dwarf are not suitable to keep with your bettas.

When judging the size of your bettas, the male betta is larger than the females. Therefore, consider a female betta to be a more compatible tank mate for your bettas.

FAQs

Final Thoughts

Betta fish is a beautiful creation of nature that is a treat to watch in your freshwater aquariums. However, it’s no wonder they can be super aggressive and territorial, and being voracious eaters, they eat everything that looks like food to them.

Therefore, experts don’t recommend keeping them with other small fish or shrimp species. A betta will eat and attack your shrimp if it feels threatened by it or is extremely hungry. Many fish keepers I know reported their betta fish suddenly attacked their shrimps without any reason or provocation.

Therefore, whether betta fish will eat your shrimp or not is a highly debatable topic with no one answer.

Rummy nose tetras are one of my favorite schooling tetras, and for good reason — a large school of them moving in tight formation is one of the most visually striking things you can put in a planted freshwater tank. What most people don’t realize is that the red coloration on their heads actually tells you how the tank is doing. A bright, vivid red nose means healthy, clean water and low stress. A faded pink head is your early warning that something’s off — water quality, temperature, or dissolved oxygen. Once you know that, they become a living water quality indicator. They do need soft, slightly acidic water to really thrive, but get the conditions right and they’re a spectacular fish.

Species Overview

What Are Rummy Nose Tetras?

Rummy nose tetras are popular freshwater fish species, originating from South America. They are particularly found in Rio Negro in Brazil and Rio Vaupes in Columbia. These freshwater aquatic species go by many names, including Fire head tetra, Red nose tetra, and Brilliant rummy nose. They are peaceful fish that are active and playful with their computable tank mates. Hence, make the best aquarium species in the community tank.

Origin and Habitat

In the wild, rummy nose tetras live in the tropical and subtropical regions of South America, especially in the rainforest rivers and streams, such as Rio Negro and Rio Meta river basins or Petitella Georgia from the Upper Amazon basin in Peru, Rio Purus, Rio Negro, and Rio Madeira river basins.

However, nowadays, most rummy nose tetras are captive-bred. The captive-bred species are farmed in South East Asia and Europe and sourced throughout the globe successfully.

Appearance

The startling difference between other freshwater fish and Rummy nose tetras is their red head that leaves your visitors awestruck.

The body of rummy nose tetras is torpedo-shaped with sheer silver color accentuated with a grayish-green hue. The caudal fin in rummy nose tetra is patterned with black and white horizontal stripes with colorless lobe tips. There is a very thin, indistinguishable black line that runs forward base to base- from the caudal fin towards the dorsal fin.

The deep fiery color in the rummy nose tetra is limited to the head region only, and the vibrancy of colors on your rummy nose tetras speaks volumes of the tank’s water quality, diet, and overall health of the fish.

Types

Rummy nose tetras are divided into three distinct very similar tetra species.

The True Species: Hemigrammus rhodostomus

The Hemigrammus Rhodostomus are the true rummy nose tetras that are often sold as the common rummy nose tetra or the “brilliant nose tetra”. However, you can easily distinguish the following by these factors:

• The amount of red coloration on the head is a little lighter than H. Bleheri.
• The dark blotch is absent at the bottom.
• The line that extends laterally from the central caudal fin is narrower in the true rummy nose tetra.

The Brilliant  or The Common: Hemigrammus bleheri

The most popular species of the rummy nose tetra are H. bleheri. Commercial breeders also produce a golden variant of the rummy nose tetra by selectively breeding, which is available for sale from time to time.

• The red coloration on the fish’s head extends into the fish’s body, beyond the gill covers.
• The presence of a dark blotch at the top of the caudal peduncle.
• The line that extends laterally from the central fin into the fish’s body is almost invisible.

The false Kind Petitella georgiae

The false rummy nose tetras can be distinguished by the other two types on the basis of:

• Bright redhead
• The black horizontal line extends to the middle rays of the caudal peduncle.
• Presence of diagonal black bars in each caudal-fin lobe, divided by white bands

Therefore, this species of rummy nose tetra is often labeled as the black-finned rummy nose.

Average Size and Lifespan

Rummy nose tetras are small freshwater fish. They grow no longer than two inches in length with a life expectancy of around six years with proper maintenance and care.

Care Guide

Rummy noses are popular schooling fish that are considered easy for beginners. However, if you don’t take care of them or maintain their water quality, things can get worse. Therefore, be vigilant in raising a rummy nose, because they take poor water conditions and other parameters very seriously.

Also, rummy noses are much appreciated by the aquarium keepers as they are quite active and very reasonable in many pet stores.

The Rummy Nose Tetra is a hardy fish when well taken care of that will live for almost a decade ranging from five to eight years. These tiny fish grow up to anywhere from one and a half inches to two and a half inches.

Aquarium Setup

In their natural habitat, the rummy nose tetra occupies the middle and top water column with a preference for slow-moving waters. However, they have usually seen feeding and swimming in the middle and bottom as well.

Rummy nose tetras stay happy in a spacious tank where they could swim freely with lots of hiding places and plants.

Tank Size

While they can qualify for a nano tank given their size, they are not the best nano fish. The minimum tank size for rummy noses should be no less than 20 gallons. It is observed that these fish occupies the middle and top levels of the tank, but oftentimes they can be seen swimming and feeding in the middle and bottom levels. In captivity, experts suggest keeping them in schools of six or more. These fish species are particularly small, which means around five of these fish easily fit in ten gallons, meaning you can fit 25 rummy noses in a 30-gallon tank.

Water Parameters

Rummy nose tetras admire warm water temperature so much. So, they should always be kept in water temperatures around 75 to 85 degrees Fahrenheit – with 78 being the most ideal temperature Also, they prefer slightly acidic to neutral water with recommended pH levels of 6.2 to 7. Any changes in the water chemistry of the tetra tank and temperature would adversely affect these tetras. Therefore, be sure to maintain optimal conditions to raise a happy and healthy tetra.

Filtration and Aeration

Rummy noses take their tank condition very seriously. The slightest inconvenience, for example, the traces of ammonia, nitrite, nitrates, and other toxins can shorten their lifespan and activity levels. Therefore, to provide a healthy ecosystem, it is suggested to use a robust filter such as HOB or canister filters to keep your fish tank free of toxins.

For larger aquariums of around 40 gallons or more, I suggest using airstones to increase aeration and water oxygenation, or you can install multiple filters 

Lighting

Like most fish, rummy nose tetras do not enjoy bright lights. Therefore, if you have a well-planted tank, I suggest using dim light or adjustable L.E.D lights to subtly light your aquarium for plant material.

To darken the tank more, you can get tall floating plants and driftwood and rocks, providing cozy, shady areas for your fish.

Aquatic Plants and Decorations

The number one rule to keep your tetras happy as a daisy is to mimic their natural habitat and see them thriving more than ever. 

Since these fish species are top- to middle-dwelling, it is recommended to get plants that reach such water columns to provide a sense of protection. Also, rummy tetras loathe bright lights. So, to give them ample shade, add floating plants and rooted plants for them to hide and burrow for shade if needed. You can add as much plant material as you want because rummy tetras are not destructive toward aquatic plants. 

For tank decorations, a piece of driftwood and a pile of rocks provide much space to hide and rest. But be sure to not overwhelm the tank with plants and other decorations because rummy noses enjoy a lot of swimming room. Low light plants are recommended for these types of tetras.

Substrate

Many tetra keepers use a dark substrate to make their radiant rummy noses and out from the crowd. But you can use any high-quality fine sandy substrate or pebble substrate at the bottom of your tank.

Tank Maintenance

No matter how many high-quality filters you use, rummy noses are very sensitive to toxins and poor water conditions. Therefore, it is recommended to do weekly water changes without stressing them much. Also, it is advised to change your filter media every 3 weeks. If you’re planning to breed rummy nose tetra, make sure to test the water quality daily as mild exposure to minerals such as Calcium and other toxins can cause sterility in these tetras.

Community Tank Mates

The good news is rummy noses are a schooling and peaceful fish. Thus, they will mix with other schooling fish, just make sure you have at least 6 to form a group.

The most suitable tank mates in a rummy nose tetra tank are:

1. Danios of all types
2. Corydoras Catfish
3. Barbs
4. Harlequin Rasboras
5. Lemon Tetras
6. Black widow tetras
7. Cardinal tetras
8. Peppered catfish
9. Siamese fighting fish

And all other peaceful, small fish. Mostly dwarf shrimps go well with rummy nose tetras. However, the adult fish might end up eating dwarf shrimp and their fry. Therefore, always opt for tank mates equal to the size of the rummy nose tetra.

Incompatible Tank Mates

The incompatible tank mates are most of the cichlids and other large or aggressive fish that may bully or harm your rummy noses.

Breeding

Breeding rummy nose tetras is a challenging task, especially in captivity because a minor increase in the calcium levels may cause sterility in these fish.

To breed rummy noses successfully, you need to provide them with soft water with a pH of around 6.5. Also, the levels of Calcium should be close to none in the breeding tank and the temperature range should be around 84 degrees Fahrenheit with low lighting.

Rummy noses are egg layers and they lay their eggs on the fine-leaved plants such as java moss. These fish lay only a few eggs at one time, that too, at night time. I suggest removing the parents into another tank because they may eat eggs. 

After three to four days, the eggs hatch, which are vulnerable to fungus. You can use an anti-fungal medication to avoid this problem. If the medication is not available, you can use natural items like Indian Almond Leaves as their tannic acid is helpful in preventing fungal infections. Check out this video by Bo The Tetra Breeder below for a timelapse of the fry’s development.

How do you raise the Fry?

The baby rummy noses are slow growers among all the popular freshwater fish. Many fish experts make them eat infusoria for at least three weeks before feeding them anything else. The fish fry is very vulnerable to fatal diseases, thus, the quality of tank water should be maintained properly.

It takes around six months for the rummy nose’s baby to munch on adult fish food such as Daphnia.

Food and Diet

Since these fish are omnivorous. They thrive well on a varied diet rich in protein. You can easily feed them premium-quality flake food, pellets, frozen foods, freeze-dried foods, bloodworms, blackworms, and much more.

In the wild, they munch on plant debris and insect larvae. But in captivity, they have a variety of food to feed on such as brine shrimp, fish eggs, green vegetables including, cabbage, lettuce, cucumber, etc, and commercial food as well.

However, don’t forget to add flake food as the base because good flake food will provide nutrients and are easy to feed for these small fish.

How Often Should You Feed Rummy nose?

You can feed these species twice daily. But make sure they finish the food within 2 minutes to prevent food decay and a murky tank.

Rummy noses are sensitive to nutritional deficiencies. Therefore, feeding them with high-quality flake food with lots of protein content is crucial along with occasional treats given on a weekly basis.

Common Health Problems and Diseases

The best part about rummy noses is they hardly get sick and catch diseases if you provide them with excellent water conditions.

However, there are some common health problems and diseases observed in the rummy noses such as:

Dropsy

In this condition, the fluid builds up inside the body of a fish. This is due to bacterial infections, liver dysfunction, or parasitic infections. Either way, proper diagnosis is recommended.

Ich or White spot Disease

The Ich disease is a common health problem in most tropical fish. The signs of these diseases are the presence of small white spots on the body and gills, scraping of the body against sharp, hard objects in the aquarium, loss of appetite, and abnormal hiding or lethargic behavior.

Differences Between Male and Female

The visual differences between the male and female rummy nose species are close to none. However, when the female is full of eggs, the body looks fuller and much more rounder than the male.

Where to get the best quality from?

Since you’ve researched everything about the rummy nose tetras, it’s time to get your hands on this great fish.

You can easily purchase these beautiful fish from online fish stores or in-store from the local breeders. Either way, the cost of rummy nose tetra is very as affordable as low $4 for a single fish, and $25 for a group of six to keep in your home aquarium.

Where to Buy

These tetra fish are easy to find at fish stores. While easy to find, not every fish store is reputable. If you want to go with an online option, I would highly recommend Flip Aquatics. Rob and his team value the care they put into their aquatic animals. It is in my mind, the best place to purchase nano fish and shrimp from. You can use promo code ASDFLIPPROMO at check out for a discount!

Rummy Nose Tetra

An easy to care for Tetra fish that loves to school. Very peaceful fish that are great for beginners

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FAQs

Final Thoughts

The rummy nose tetra is a beautiful addition to your community aquarium. The most crucial part of raising a happy and healthy rummy nose tetra is to provide them with ample free swimming space and a well-balanced, nutritious diet. Besides, they are a very hardy fish with a lifespan of around six years, if taken good care of. 

📘 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.

🐟 This article is part of our Tetras: Complete A-Z Species Directory — your guide to every tetra species in the hobby.