Originally Posted by toomanytoys http:///forum/post/3045128
got my hair algae under control and almost gone but now this stuff has cropped up . what is it and how do i get rid of it?
From what I have been reading lately it is dying coraline algae. It is becoming a problem in the ocean. search the words "black algae" on the site, one post talked about it, and had an article to hyperlink.
One guy had it on his rock for a long time and it didn't spread so that is a good thing.
I just had the same stuff and it spread quick!we bought red slime remover and put that in which was bright yellow, and it killed it all! I just had to shut the skimmer off for 2 days. everything is good and that stuff is gone!
I have read that cyano can come in black, as well as red, green, and brown. Don't think it's dying coraline-it usually just bleaches white when dead, in my experience.