Opened the pool this weekend with pretty good numbers and passed the OCLT. Something new this year from last is that I have pretty constant air bubbles coming from the return jets. I have investigated everything I know to do and everything checks out (at least to my amateur eyes). I verified the pump lid and o-ring are not cracked/seated in place, the water level is halfway up the skimmer trim piece, and the plumbing o-ring right before the pump is seated and in good shape. I did clean out the DE filter, but don't think this had any impact since the bubbles were there before and after. What else do I need to look for or take another look at in a different way? Thanks for the advice!