Originally Posted by
meowzer
http:///forum/post/3029725
Cyano is not only caused by low flow, it is also high nutrients....what are you feeding your fish, and how much of it?
have you tested your phosphates yet? What about your other water tests are they ok?
Op bought the rock with that color on it, so any problem was not caused by the OPs tank, with good water quality any cyno will disapear.
I think it is all coraline. I bet it wont even scrub off. It looks like my coraline. All that glowing orange is new coraline growth that will turn dark red. Those pieces were a great buy.