Hi, this is our second year of pool ownership. We bought a house last year that had a pool with CYA well over 100 ppm, so we drained it two months ago and refilled. We can't seem to keep the pH down, though, now so I'm wondering if we need to aerate. Here are the stats from a few minutes ago:
pH - 8.0+ (My kit only goes to that)
FCL - 0.6 ppm
Alk - 110 ppm
CYA - 30 ppm
CH - 310 ppm
I double checked to make sure the pH reagent is still good and it is. We were going to add more bleach today as it is a little green until I got the pH results again. We added muriatic acid a week ago and had it at 7.4 ppm. It pops back up over 8 ppm every week, though. Also, We try to keep the pool covered because we're in the windy season here. The temp with the cover on was 85, but dropped to 74 today with it off.
Any suggestions on what we're doing wrong are appreciated.