Simple question really. I learned the hard way last year that the only way to lower CYA is drain and fill but I was wondering if evaporation plays a role in this at all? If, over the course of a season, you replace a foot of water (just throwing that number out there) does it lower the CYA the same as if you drained and refilled a foot of water?
I leave a simple garden hose in my pool and every night it runs 15 minutes to refill what I lost to evaporation. It's not perfect but it works okay and helps when I am on vacation so the pool doesn't get too empty. My CYA did seem to go down a bit but I also could be imagining things. From my experience last year I had to drain A LOT of water to get it down from 80+ to 30.
I leave a simple garden hose in my pool and every night it runs 15 minutes to refill what I lost to evaporation. It's not perfect but it works okay and helps when I am on vacation so the pool doesn't get too empty. My CYA did seem to go down a bit but I also could be imagining things. From my experience last year I had to drain A LOT of water to get it down from 80+ to 30.
