pump efficiency

Hi, I have an intelliflo VSF 3hp pump with a separate constant water feature pump that run as needed to run the water feature. I have pantair 420 cartridge filter with inline tab chlorintor and pentair gas heater. I also have a spa with spillway in the pool and a water feature on the side that...

I have a Pentair VSF pump. When we first opened the pool, I wrote down the flow rate at various speeds. We have a manual heater bypass valve to isolate flow away from the heater when not in use. Other than a dirty cartridge filter (which I've already cleaned in hopes of resolving this - no...