How would I check if I need a new pump / filter? How an I tell if the one I have is adequate? We swapped out for a StayRite PLM100 last summer and the pool has just never been good since then. It's so green.... I know with slamming you're supposed to run 24/7, but this filter I get very little flow after 4 hours so there's no point in running overnight. I end up cleaning the filter several times a day.