I know the main reason of my gha is that it's because it's a new tank and it's one of the normal stages of a new tank. But my question is how long does this horrid algae stay for? it's starting to grow pretty long on the rocks and getting really bad on the glass. I'm also getting a little bit of cyano. To get this out of the way, tank is 3 months old, livestock is 2 clowns and a blue tuxedo urchin. Yes Ro/di water is used. And i do have some nitrates but is going down. No i don't have a phosbane *sp* reactor or anything like that but i'm considering one, but i don't know. So how long does this ugliness last! i hate it! i remember seeing jwin's and triplemom's gha algae at the beginning and hope mine doesnt get as bad as theirs.