I know you guys have probably answered this many times but i have extremely green water. I was readin on here to change the water so i was doin that and in fact i took out all the rock and everything. Still changin water. 80% at a time. I know its alot but one of the post on here said to do that. I guess know you want to know parameters.ph7.4 ammonia0, Nitrite0, Nitrate about60. I have 3 Yellow labs, 2 electric Blue/yellow chichlids, 4 Rusty, 4 Pcudeo Acei, 3 Chinesse Algea Eaters. It's A 46g Bow Front. I have a Cascade 1000 and a top fin 60 filter. And i have an air pump on there connected to an air stone. Now ur probably going to say my tank is over stocked but i stocked according to AqAdvisor - Intelligent Freshwater Tropical Fish Aquarium Stocking Calculator and Aquarium Tank/Filter Advisor. Then if you scroll down check out the 55g mbuna set up. I adjusted the numbers and filters so i would get the same out of my 46g. My tank also does not get any direct sunlight. It does get the ambient light from room but not direct. I leave the light on now cuz leaving it off did nothing. I also tried the chemical which i know you guys don't like. But i am Desperate.