Hi PoolDoc,

The Battle is getting better,

4-6-11
TA - 120
Hardness - 120
Chlorine - .5-5.0
CYA - 120-130

Last night I add 4-cups of clorine and this morning was @ 5.0 or better @ 2:00 pm it's at .5-1.0, is this due to my High CYA, per HTH instructions they recommend 20-50 ppm and say the only way to lower is to partial drain. Your recommendations as since I'm just now getting my TA, PH in line, I really don't want to drain and put more of my bad fill water in again.

P.S. I rechecked my fill water again just to be sure and the numbers where the same. thanks