I have a 54 gal freshwater tank that I set up 4 months ago and have not been able to clear the tank up. It stays cloudy to the point you can not see the few fish I have in it. To start off with, I have an Eheim ecco filter and a emporer power filter running. Temp 78 degrees. I have maintained water changes weekly, added water conditioner etc,. Ammonia, nitrites, nitrates, all neg. PH 7.0. I have algone in the filter as well but it won't clear up this tank! I first thought it is a bacterial bloom and will fix itself but I am to the point now of tearing down this whole set-up. I only have 2 cory's, 1 large angel, and 3 german rams in the tank but they are surviving somehow. Pretty much, you can do a large volume water change and the water will go from milky looking to green in just a few days. I don't believe it is lighting because right beside this tank I have a 72 gal cichlid tank that stays crystal clear. It receives the same amt of light etc,. Any ideas what to try next short of dumping this tank?