My 55 is green. SOLID green. :;dk Algae bloom I guess? I rinses my Can filter out - everything was green. I don't know what else to do, I've done HUGE water changes, and fasted my fish to limit nitrates. I can't even tell if everyone is even still alive. I also lost fish in my 20, no idea why. I'm just really discouraged in this hobby, it's becoming a lot of stress & tears and it shouldn't be that way.