Required CYA levels for a SWG


LifeTime Supporter
May 21, 2007
Cape Coral, FL
I just installed a Autopilot SWG and it appears to be maintaining chlorine just fine (only had it in 2 days). My weekly sample of cyanuric (CYA) today says 35ppm, where as the Autopilot manual says I need 60ppm. Is there any adverse effects on the SWG if I elect to not add additional CYA until next year. My readings indicate the 60ppm level is to give the SWG a chance to generate chlorine faster that the sun depletion, but since it is late in the season and already getting in 70s, I think my chlorine depletion rate is decreasing. I certainly do not want to ruin my new SWG


Mod Squad
LifeTime Supporter
Platinum Supporter
TFP Expert
In The Industry
Apr 1, 2007
Sebring, Florida
hi, Don,

Essentially, what you are doing with the lower CYA is asking your SWG to work a little harder. Other than that, I would see no harm but I think you could turn down your SWG and extend your cell life if you went with the recommended level of 60ppm.