granniecramer

Purchased family home..with a pool. No idea what I am doing. ( which is obvious) ...since a green pool never happened to my parents in over 40 years. New liner with Sand Filter installed in 2018. Sand Filter recently repaired. I know I shouldn't rely on pool store testing, but have my doubt about my abilities to self test. Thank you to all who try to help! PS: Only option was "liquid" chlorine..but I use a Chlorinator with the discs..not liquid!!