Can you test cya during a slam process?


Well-known member
Jul 6, 2018
Doylestown, PA
Can you test cya during a slam process? My pool was 50 on opening when I recently returned from vacation Friday the pool was clear with alot of green algae in bottom because I left pump on low because person watching it was unable to care for it. I did t want the basket getting jammed up etc. Some chlorine was added while I was away however it still went south. I started slam process of pool with FC of 20ppm and today pool is not green however still cloudy. For some reason I add chlorine to bring to 20ppm and whithin hours it's back to 12 ppm I redose but feel like I am using alot of chlorine. 6 gallons already on a 17k gallon pool. I decided to test cya and it appears it's about 20. Is this right? Can I be overdosing with chlorine or is my cya not right because I am slamming


Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
Laughlin, NV
The chemistry does not work that way with melamine reagent.

If you know your CYA is low, add 20 ppm stabilizer now and test in a few days.