I have a problem with air in the pot strainer when running the pump. It only happens when I have both skimmers open and the main drain. I have a d.e. filter and when the pressure is at about 22 I get a lot of air. When I close the skimmer closest to the pump about 1/2 and the main drain about 1/2 it all clears up.

This morning I decided to use my "Circulators " on the returns. Haven't used them in a long time but the water seems to be a little cloudy and I am sure the bottom water is not getting filtered enough since I have the main drains closed. When I put on the Circulators the pressure goes up to about 28 to 30 and I can open all 3 valves, the 2 skimmers and the main with no air.

Why is air getting thru when the pressure is at 22? I might add the water coming out of the returns about put a hole thru your body if you get too close.