I'm not sure what is going on with my 45 gal. freshwater tank. The water has been cloudy for almost a week. On Monday I did about a 20% water change. my pH, N02, N03 are all normal,my pH has always run higher- my ammonia has been going around .25-.50ppm. I have been testing my water daily and it remained consistent. I did use ammonia lock but didn't notice a change (to 0). I'm not sure what is going on. At a local pet store they tell me my water is great, but why is it cloudy? Should I do another partial water change? I have 2 angels, 3 gouranamis, 2 clown loaches, 1 plecko, 2 tetras, and 2 danios