cya level drop

It seems to my my CYA levels are dropping faster this year than previously. I tested on June 4th and it was at 75. I tested today and it was at 45. The pool has been used - but not a lot of splashing and not even a lot of evaporation (I had to top off my pool about 1.5 inches today…first time...

I just returned from a 10-day vacation. Prior to leaving, I wanted to make sure that all my chemical levels were balanced - and I had everything clean and balanced. I tested the day before I left, and my CYA level was at 75. When I returned, my pool was green (now I get to SLAM!), chlorine...

The saga continues ..... I‘m a few days into a SLAM from a tadpole oasis to (hopefully) a human oasis, and was seeing cya in the 50-60s. I finally got up to FC of 24 or so last night, but today, midday, had a cya level of ~20-30. Did some reading here and saw that sometimes cya can drop when...