Certified Pool Operator Study Guide Rated A+

how often should in a sand filter be replaced {Ans: every 3-5 years}how to get a pool water sample {Ans: Take a test sample of pool water with a comparator block. Test away from return lines and at elbow depth}where does water go after going through the pump? {Ans: filter}Flow meter measurement unit {Ans: Gallons per minutes GPM}how often must you check pH and chlorine? {Ans: every 2 hours ? and record in daily pool log}where does water go after the filter? {Ans: heater}