Purple coralline algae growing on my sand

Its cyano! Coralline does not grow on sand. Your nitrates and phosphatesmake it grow. Cyano also comes in green. Lowering the "trates" will be a big challenge and there different ways ot approach it. In the mean time try a dose of Red-Slime remover.


haha you got tricked by ourfish dredging up an old thread :bounce:
 
Haha that's fine, you asked a general question while sen was answering one from over a year ago so i had to tease a little
 
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