A friend is having pool issues. He says, no matter what he does, he can't get a FC reading. Yes, he is using strips and pool store tests. 20K gal IG pool, water is clear. I went by today with my TF-100 and tested.
FC .5
CC .5
Ph 6.8
TA 80
CH 300
CYA 50
This year since opening he has added, Cal...