First off pool is marvelously clear, numbers are good and slam complete.
When i tested in April had
CYA 60 so slammed at that number 24 fc
May 6th completed slam with 0 overnight chlorine loss.
So i added some muriatic acid to which brought me to
Now we've had a good deal of rain in Pittsburgh, and i did have to pump out about 4 inches of water. Tested CYA today plenty of sun and I'm coming up with 30, almost to point of the dot not disappearing.
Is it possible that the agent is bad, or has my CYA really dropped 30, which i wouldnt complain about. I could cut down my chlorine usage, but i dont want my pool to turn green.