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Coralline algae–the algae you want in your tank

I don’t think the average aquarium owner thinks about algae as being a good thing—but there are algae, Coralline Algae, that are desirable, attractive and a hallmark of a healthy tank. Although the word coral is in coralline algae, they are certainly not corals. Coralline algae are a macroalgae that has a calcified (stony) skeleton, similar in some ways to the skeletons …