What a great site this is. I've been lurking for some time and learning, finally ordered my TF-100 test kit (with stirrer) and here we go. Bought the house a couple of years ago and continued to use the trichlor pucks until this summer when I switched to bleach. Knew from pool store tests that my cya was very high. Fought cloudy water and some algae all summer. Drained half the pool this w/e,refilled with city water and have the results:
Old readings TF-100:
PH 7.5 (but how accurate at FC 24?)
New readings TF-100:
CH 575 (new fill water 375)
Things sure moved in the right direction, but should I do more partial drains to lower CYA some more?
Do I need to do an OCLT? Can I live with 575 CH? This is not a salt water pool. Thanks for all the help. Dave