My pool had a cya measurement of 20 a week or so ago. I have only been adding menards 12.5% bleach as needed and had (1) 3" chlorine tablet in a floater. Today my cya measures 45. I checked it 3 times just to be sure. What could be going on?
What as the temp of the water when you did the first test, if it was below 70 it could have been off, and that 1 puck added CYA and I bet there was some leftover in the floater...
The CYA test is known to be off with cold water samples, but works well when sample is at swim temperature, so if testing a cold pool allow the water sample to warm up.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!