At the beginning of the season I tested my water in the store I go to with computerised testing.
It showed 58 CYA - quite a bit down from last year wgen I was at 98. (Yes I did use that bacterial bio stuff and it did seem to work....kick me).
Anyways, I was away for two weeks and so I put 6 jumbo tabs in the chlorinator to keep the pool chlorinated in my absense. The pump ran 5hrs per day and for now it looks like no more than half is used up.
Today I decided to test the water (had a light algae bloom so after I squished it I decided to test for CYA) - the same store showed 95.
So, the only reason I was using tabs was I was hoping it would not raise CYA too much given the amount (6 tabs in inline chlorinator, again by now about 3 have been used judging by the height of the tabs column in the chlorinator).
Could tbey? Or is it the test error?