Ok here we go

[CarlD]

I occasionally use pucks--when both my pH is high and I want to raise my CYA level slowly. Or I'll use up some of my di-chlor powder. When both are gone, I'm back to my mainstays anyway, bleach, CYA, dry acid or muriatic acid.

IF you test your water everyday for chlorine and pH, and check all the tests once a week (FC, CC, pH, T/A and CYA) then you can control it. Sooner or later using pucks your CYA will hit the max you should be using (it's different for each situation and owner's preference).

The key to EVERYTHING in pool maintenance is proper, frequent, concistent testing. Takes 2 minutes a day to run the OTO kit chlorine and pH test. Even with Ben's kit and the FAS DPD powder it only takes 5 minutes a day to test chlorine and pH. The full battery of tests takes about 15 minutes, once a week. It will save you are WORLD of trouble and a heap of money.