Having trouble figuring how to fix my problem. I have a chlorine generator for my salt water pool. I was in a quandry as to why I keep getting air bubbles into the Polaris as well as out of one of my pool inlets. I have figured out that the "air" is probably oxygen generated by the generator. When I turn off the generator the bubbles go away. Duhh. But I still can't figure out why the oxygen gets caught in the Polaris bag. I ordered an aftermarket replacement bag a while back so the mesh may be too close. I have ordered a Polaris bag and will see if that fixes it. Will post when I figure it out.