I've searched around the forum and found a few threads around this but nothing very specific. When I turn my pump on, everything seems to be working fine for a few minutes. Then it slowly starts to develop air in the pump basket and small bubbles start coming out of the return side (just one return). Also, the return pressure is pretty low. If there's air coming in on the suction side, that means it should be somewhere above ground, correct? Otherwise I would think I'm just losing water but that doesn't seem to be a problem. Any help is appreciated.