The formation of pond scum begins on the sides and builds up from the rocky bottom. When algae gets uncontrolled, it produces oxygen that makes it buoyant, and it floats to the surface of your pond. As a result, slimy and gruesome scum develops that usually clings to the ponds’ wall or filters, making them impossible to remove. Once the algae grow aggressively, it messes up with your pond ecosystem and overwhelms the pond’s surface.
In this article, I’ll discuss the causes of pond scum, types of different algae, and preventive measures to control pond scum in your garden ponds.