My cya is at 65/70 ish ( as we know, impossible to be accurate) . Should I raise it to the shock value of 20 as per the bottom of the pool math calculator , or 28 as per the cya/ cl chart - they differ. Thx
Thank You ! good luck with your pool.Let me start off by saying Best wishes to you Daughter and hope she has a speedy recovery. I just found TFP forum myself. Buying the proper test kit TF-100 following the guidance of members and the pool math calculator for the first time of owning a pool for 10 years I'm in control and it cost less. Big plus my weekly trip to the pool supply store has stopped I will need something sooner or later but they won't need to test my water. No more wall of snake oil.