Done a lot of reading lately due to pool problem this year.
This is my 7th year with the pool. Had an algae bloom I could not kill. Went through 100 lbs of chlorine, and a bottle of algaecide. My pool is eating chlorine.
Anyhow...took water to Leslie's. They told me my stabilizer was high. Sold me a $60 cluture to add to my filter. No help... When retested they told me my CYA was 160. Drained half the pool and refilled.
Found this site, bought my $100 pool test kit. Checked CYA and am getting a reading that is off scale too high. Drained half my test bottle and filled back up with tap water and tested again. I got 85ish. Did the test twice with similar results. So I take it my CYA is 170 correct? Nothing can throw this off? I am back to draining part if my pool and refilling again?
Why would my CYA be so high this year? Due to a drought we had, i used rain water to fill my pool last year. Any way this could cause it? Used mostly tap water when filling after the half drain I did this year.