I am having a problem getting my water clean. The water is clear but I have a lot of particulate floating around in it. I can't seem to get rid of it. It just stays suspended in the water column and won't away. I do run filter socks that I clean 1-2 times a week. I am including a diagram of my flow, sorry for the crappy pic. My over flow is offset in the back and have 2 returns going both directions across the back glass. I have 2 rossmont powerheads pointing toward the front glass, and an MP 40 on the side going across the tank. I just never see any of the particulate get skimmed and go into the overflow box. It's always in the water column. Any suggestions will be tried, thanks.