The tank was in the basement so it didnt get much sunlight but the tank light was on about 10 hours a day. It is a 55 gal tank w/ a 5" convict a 2 2" cichlids a 3" jack dempsey a 3" peacock and a 3" pleco. I had playsand in the bottom with fake plants and a big piece of driftwood. I fed them flake food twice a day with occasional cichlid pellets. I did water changes at least once a week and by that point it was usually pretty nasty. There were some rocks in there that were light gray like clay and if you rubbed them, a little cloud would come off of them, I think this might have been what was making the water cloudy, but it was getting green, and there was green slime growing on the underside of the hood. I also had some rocks that I got from outside, could there have been something on those that caused the green hue?