So first I put in 2.5 Gallons & got a reading of 0 Free Chlorine. I thought it was the Chlorine. So then I put 2.5 Gallons from another Store. These are 10% Chlorine. Still No FC or TC.
I ran test with 2 different Test Kits.
CH: 300 4 days ago put I put 30 LBs of Calcium in because it read a Low of 80. It's a Gunite Pool.
It's hot here. 90 Degrees.
Any ideas why? The first time this ever happenned.