Since I started getting familiar with the new pool I am noticing that air seems to be getting into the system when the pump is off.
Normally whenever the pump turns on, the jets in the pool push staight water and there are no air bubbles. Whenever I clean the pump filter baskets, or clean the main cartridge filter, air of course gets in and when I turn the pump back on the jets in the pool will push air/water for about 20 seconds until all of the air is pushed out.
Now I am noticing that when the pump turns off I can hear air bubbles somewhere in the system creeping in (similar to the sound when I break the seal of the pump filter basket cover to clean them). Now when the pump turns on it seems to ALWAYS be pushing air for the first 20 seconds even when I don't touch anything.
Anything obvious that could be causing this? I can't really think of anything I've done differently, though I recently cleaned my main cartridge filter, SLAMed the pool, and took the pucks out of the chlorinator. All my test results are spot on and have been maintaining good FC levels since the SLAM.
Thoughts? Should I be worrying about the pool equipment with constant air being pushed in/out?