I have had this problem for like a month now,i do reg partial water changes,about a quarter of the water once a week.My tank was overstocked about 2 monthes ago,so i thinned it out alot,down to 3 fish.2 cats and a 4 inch Midas.My water will look pretty clear after a water change,but by the next day it is cloudy again.What could be causing this???




