I have a Pentair 520 cartridge filter. My starting pressure is around 10. I cleaned the filters last weekend as the pressure was getting up around 17-18 and the filters were pretty nasty. I cleaned them and reinstalled and the pressure was back down around 10. Over the last few days, I've noticed that it's starting around 10 when it comes on and it's dropping down to the 7-8 range. I'm getting a ton of oak tree flowers in the pool and am diligently keeping the skimmers cleaned out and the basket by the pump.
Should I be concerned about the pressure drop? I've not observed that before. If so, what could cause that?
Should I be concerned about the pressure drop? I've not observed that before. If so, what could cause that?