Hi all. I've got a pool with relatively high CYA. It was 160 when I started, and via water replacement I got it down to 60. I decided to stop there and let my levels drop as I replace water through the season and over winter.
So, with that acceptable but still high CYA, I'm maintaining a higher FC number than I'd really like to at 7ppm. My previous pool testing experience had me using a basic taylor kit and just making sure FC was somewhere between 3 and 5. We never even looked at CYA level.
So as I long for the days I can maintain a lower FC level, I'm wondering, how high would you have to take the FC ppm rating before it started to bother your skin and eyes? I know CC is usually the "smell and red eye" culprit, but there's got to be some level at which FC can irritate also. I'm assuming it's well beyond 7ppm though, right?
Also, at what point am I doing damage to my vinyl liner?