Help! My CYA is off the chart also. I filled my Taylor K-2005 CYA test only 1/2" when the dot disappeared. Took sample to Leslie's pools on Sun and got reading of 100 (the highest their test goes). I've had my pool 7 years. Drained, acid washed & refilled 11/2008 due to high calcium. How can the CYA have gotten so high so soon? I'm using Chlortabs from Leslie's pool which have stablizer in them. I shocked the pool Sunday & then again on Monday and the chlorine reading today was 0. Is draining the only way? If so, how much do I need to drain? And...how do I avoid having the CYA rise so quickly again? I just found your site today (yea) and haven't had a chance to read everything (there is so much).
FC - 0
TA - 130
CH - I got 40 on Sunday @ Leslie's, but just did a Taylor test @ home & it never turned blue even after adding a lot of reagent.
CYA - off chart
I'm headed to Leslie's again for another test. I don't trust them, but want another reading on that CH.
Thanks - I'm in a panic about it.