So I've been chasing what I think or thought was a suction side leak for several weeks. There is a fair amount of bubbles in my pump lid plexi-glass. I've checked and lubed the lid O-ring, checked the skimmer level, checked the pump drain plugs, and all the exposed PVC joints. My pool doesn't have a main drain at the bottom. This evening I removed the actual strainer basket from the pump and the bubbles disappeared. However, after a couple of on/off cycles of the pump, they eventually returned. So, I'm stumped again. I guess my next step is to pressure test the lines and ensure that the in ground plumbing is fine. Any ideas or suggestions?