Morning everyone, So I did a water change last night and now my readings are kind high. I've had my tank cycled and running on it's 3rd or 4th month with fish in it 75 gallons Ammonia is 0-.25 Ph- 7.8-8 (where I want it) Nitrite-1 Nitrate-10-20 Now I did nothing but change the water and added prime. The water always seems kinda cloudy after a change which I know is because of my sand. But recently it's getting cloudier, I've changed the polishing pad about a week ago but that's all. Any ideas?