If I have ( don't ask why it is a long story ) a Triton II TR140 sand filter with a WhisperFlo 3hp Pump in a pool 13' deep pool (35,000 gallons ) how long do I have to leave it run ? I live in AZ and it is 115 outside, I know that every 10 = 1 hour , but if my math is right I am filtering 32,000...