Ok, So I am trying to bring my CYA to 50... I know it should be 70, but I want to bring it up slowly because when the solar cover is on, chlorine goes through the roof!
I already put in 1.9 kg (68 oz) of stabilizer in my pool 2 months ago but it seems my level is only at 30 (!!) (or slightly below) according to my TF-100 test kit... According to pool calculator, it should be at 38! So I should be measuring/testing 40. Even if I cheat on the up side, I can't get 40. I really see the black dot at 40...
So, before I put too much of the stuff in there, should I assume it's at 40 and I can't test to save my life or should I assume it's at 30 and adding this stuff is more like art than science?