CYA level over time.

[PearlJamFan]

Quick question. I have a 12,500 inground with a SWG. Since CYA does not evaporate like chlorine, does the level change with evaporation and auto fill. Meaning with water disappearing then being refilled I would assume the CYA level would go lower?

I did a CYA test with a Taylor 2006 and it was around 30, I would like to get it and 60-70. Last year my levels were spot on.

Add more stabilizer?

 

[mknauss]

CYA does degrade here in our climate. High water temperature (above 80F) and intense UV will degrade it by 10-15% per month during the summer. Evaporation does not reduce CYA.
Test you CYA level every month and add back to the target level.