Quote Originally Posted by polyvue View Post
I should cut back on my nightly dose of cyanuric acid... drinking it hasn't helped my neurons one bit. In my pool (SWG chlorination), I try to maintain a rough minimum FC level of 5% CYA. My understanding, despite what I said above, is that non-SWG pools do better to target 7-8% minimum Free Chlorine. With CYA of 50 ppm, that's 2.5 ppm FC for SWG pools, 4.0 ppm FC for non-SWG pools.

Thanks for catching this!

Polyvue, LOL amen on the nightly dose of CYA it is worse than diet soda. Your post struck a cord with me and I can't thank you enough. On Memorial Day, we had all the kids in the "New" pool. CYA was 50, FC was 5.0+, pH was 7.6, Salt was 3300. Everyone agreed there was slight eye irritation. I have cut my FC down to be more in line with your numbers. I will keep you posted.