We have been battling high Alkalinity and high CYA since we opened our pool about a month ago.
Currently (using TF Kit we bought online):
FC = 2
CC = 1
TA = 120
CA = 320
CYA = 110
25,500 gallon inground concrete pool. Water temp 78.
Our TA is in much better shape at this point in time. We stopped using calcium based shock and sticks and have been using only Clorox for the last 3 days. Our FC is still going down each day due to the high CYA. We have come to the conclusion that we will need to drain and refill some of the water to stabilize this. What is a good amount of water to drain off. We will need to have a bulk water company do the refill since we our on a well and do not want to put alot of strain on this. Thanks for your help.