Hello FishLore! I've had cloudy water for about 2 months now, and have been trying to figure out the cause and need some help from you! Established tank, no new fish Using water clarifier is bad! Ive scrubbed the inside of my canister filter in tank water to get all the gunk out. After the scrubbing, I used some filter floss in my canister to remove all the fine particles. Changed the carbon in the canister filter. So: It's not fine particles(Floss). It's not chemicals(Carbon). I've determined the following: 1. Ammonia/Nitrite = 0 (Has been cycled for almost a year.) 2. Nitrate= 40-80 PPM. I realize this is high and I'm doing 20% water changes daily. (Is this the best idea to get nitrates down?) At this point, the tint of the cloudiness has gone from (very slight) brown(green?) to completely white. I heard that excess of phosphates could cause cloudy water. I used my phosphate test kit and see that my tap water is 1-2PPM and the water in the tank is 5-10PPM which seems extremely high. 3. I put SeaChem SeaGel in place of the regular carbon to reduce the number of phosphates. Its now down to 2-5PPM in the tank, which is still high. Slightly noticeable difference in cloudiness. Got a little bit better. Still quite cloudy. Would phosphate measurement of below .5PPM cause water to clear up? I've been thinking of purchasing SeaChem PhosGuard to increase the effectiveness. Your thoughts?