When running my automatic cleaner (Barracuda G4) I get air bubbles in my system. My set up uses a skimmer as the vaccuum site. My dedicated vacuum line has never worked. When my cleaner is on I have to close some drains for the suction to be enough to work properly and move the cleaner. For this to happen I ALWAYS get air bubbles in the pump basket and can get so much air that I lose prime. When the Barracuda is taken out I never have this problem. I can even turn off all valves but one and no bubbles. What the hell is going on?