Help, little to no chlorine readings all summer. 2 pool stores later and plenty of money. Phosphates high, stabilizer was low, treated as told. A friend told me about this site and the TF-100 test kit, I purchased it since my original kit and the 2 different test strip kits give different readings. As of today , I have a 17000,gunite pool, with a fiberglass DE Filter flow rate is 150GPM. My numbers are: FC-4,CC 1-1.5, TC 5-5.5, PH 7.2, TA 120, CH 470,CYA 100