I have learned so much so far from this site but am still a work in progress. Twice now the water level in our new pool has dropped to where the skimmer was making gurgling noises. Both times my husband caught it and raised the water level. Each time after this happened I noticed when I got home from work that the flow from the return jets was lower than usual and that the pool water wasn't moving around the pool as quickly as before. The first time my husband cleaned the cartridge filter and when I got home all was good. The same thing happened yesterday (no rain lately here in Central Florida), low water level, added water, low return pressure. Cleaned the cartridge filter again last night after the pump shut off for the night so I don't know if there's been an improvement yet as I'm at work.
I guess my question is why when the water level in the pool gets low (not actually below the skimmer) does the return pressure drop? Should we be checking something after adding water to the pool? Bleeding off air somewhere? Neither of us is very mechanically inclined.
I wasn't home for pool school and my husband didn't pay attention. Also, PB is battling a serious illness and isn't available to come back out and show me how everything works.