So I've got air bubbles coming out of the return lines into the pool. When I start the pump, I leave the air vent on the filter open until water comes out, and then I close it (I learned that on this site). Everything looks great, and then about 10-15 minutes later, I've got quite a few air bubbles coming out of both return lines (and the booster pump return as well).
So air is getting in there somehow. I have identified a leak in the above ground plumbing right before the pump input. But it only leaks when water flows in the opposite direction, right after shutting the pump off. Could that introduce enough air to make it through the pump and filter and to the return lines? Or do the air bubbles mean there is a leak after the pump?
Also, can air like this contribute to cloudy water? I wouldn't think so, but since I'm in the middle of a pool shock right now, I'd hate to be wrong and be waiting for something that is never going to happen.
Thanks for any suggestions or further references. I didn't even know that was a problem until I started reading this site!