Our 340 square foot cartridge filter has increased in pressure by only 3psi since it was installed about eight months ago going from 11 to 14 psi. It has a dial that shows 'clean' at 11psi and 'dirty' at 21psi. My question is should we clean the filter anyway? We keep our pool very clean and the trees in our yard are about thirty feet from the pool. What do other cartridge filter owners do about cleaning?
Last week I turned off our waterfall and the pressure shot up to 22psi. Is it OK to run at this pressure? I turned them off to stop the water from cooling down and I noticed a lot more turbulence from the returns which seemed to help the skimmers with surface cleaning. The increase in pressure made my Polaris start moving around the pool as if the booster pump was on. I just wanted to make sure it would not damage anything by doing this.