CYA / Pool Pilot Question

[cwstnsko]

The importance of CYA is purely a function of the need to protect chlorine from the sun. If you don't get much sun and you are not seeing the chlorine drop during the day, you may be fine. If you are indeed using a higher setting on the SWC to compentsate for Cl loss to the sun, your trade-off is cell life, and the fact that Autopilot might not honor their cell warranty if you run w/o CYA.

I ran my SC-48 cell with low CYA and output at about 40%(24/7) and I had a cell fail in less than 2 years (17000 amp-hours of use according to the controller). Luckily for me, Autopilot replaced it under warranty, but I run about 30 ppm CYA now and run the output lower

Most of the quasi-scientific looks at CYA seem to show that the majority of the benefit is realized in the 1st 10-20ppm CYA. A little CYA might yeild measuable cell life gains without compromizing sanitization too much.