SquishyFishy Posted January 13, 2016 Share Posted January 13, 2016 Well, I've been battling cyano for weeks now and then I notice these new spots of black algae starting to appear on the back wall. Just round spots of black stuff. Harder to scrape off than red slime. What is this? Getting pics now will put up in a minute Link to comment
rone_kevin66 Posted January 14, 2016 Share Posted January 14, 2016 It could be a type of Coralline. Link to comment
CronicReefer Posted January 14, 2016 Share Posted January 14, 2016 Yeah more than likely its black coralline algae which is a good type of algae that many people strive to grow in their tanks. It usually grows with some color (blue, red, white, purple, green, black) but it won't take over your corals like other algae. Link to comment
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