During this process, biogenic decalcification takes place, and calcium carbonate precipitates, which is then used by the algae to fortify their cell walls. To explain further, black algae can separate the carbon from the hydrogen carbonate ion, which in turn creates hydroxide ions that elevates the pH. If there is a CO2 deficiency, BBA can take the carbon they require from hydrogen carbonate much easier than any aquatic plant in the tank. Most often, there is no CO2 or fluctuating CO2 levels in a tank with BBA. It's important to note that overfeeding fish or having an overstocked aquarium will lead to a larger amount of waste in the tank. These organics decompose and add nitrates into the water, which both live plants and algae use to grow. Black Beard Algae can be a result of poor water quality, poor maintenance, overdosing fertilizers, low levels or fluctuating levels of CO2, too much light, or a combination of all of these.Ī tank that hasn’t been routinely cleaned can have a lot of waste and organics built up. The black algae will take advantage of the surplus of nutrients and utilize them to grow and spread throughout the tank. This imbalance is most likely due to an abundance of nutrients. Like all other algae, the main reason BBA grows is because of an imbalance in the aquarium. BBA likes to grow in areas of high flow, but can also be found in areas with low circulation. Contrary to its given name, black algae can either be black, dark green, or dark red in color. They look like dark patches of hair and typically grow on the edges of leaves, driftwood, stones, or other types of decoration. The form of Audouinella that we encounter in the aquarist hobby is commonly referred to as “black beard algae,” “black brush algae,” "black algae," or “BBA” for short. It’s a genus of red algae that exists in both freshwater and saltwater environments. Out of the many types of algae that we see in freshwater fishkeeping, black algae in the fish tank is arguably one of the most stubborn to remove.but don't get discouraged!Īlthough it can be somewhat troublesome to get rid of, it is not impossible.Īudouinella is the scientific name for black algae. Have you ever encountered this ugly black fuzz growing on the tips of plant leaves or on your aquarium’s hardscape? If so, it's most likely Black Beard Algae (BBA), also known as Black Brush Algae. Written by: Tammy ( ) and Team Buce Plant
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