Okay start by taking out your bioball, and using some live rock or nothing at all back there except for a filter pad, then if you are havinbg problem with cloudy water its probally sand beening blown around from your return or powerhead you need to adjust on so it breaks the surface of the water and the other at the half way mark, just so it is not blowing your sand around. Also a good additive is a bage a chemi pure elite for good water clarity.