I use full RO water in my new tank but am already starting to get horrible green growth on my LR, the tank is quite close to a window so I'm thinking the amount of daylight it gets it causing this. I will be adding a background to to the tank and trying to limit the amount of light it gets but can anyone identify what this stuff is exactly and what would be the best way to remove it and keep it under control besides actually taking it off the rock.
Thanks!
Thanks!