My Ph has been continually creeping upward. The pool was completely renovated in April. This included a new liner, new pavers, and coping. For the 13 years prior to this renovation, I've always had to deal with Ph dropping BELOW range. Now, I find it inching past 8.0 every week to 10 days. I address it by adding 2 lbs of Sodium Bisulfate and I'm good till the next week. As this has been going on since May, I've just switched to Muriatic Acid because it's cheaper.
What could most likely be causing this? Could it be completely attributable to the fact that I now sanitize with 8.25% Clorox bleach, like the pool store guy suggested? I think I've eliminated aeration as an issue when I cut my pump operation to 8 hours. Could there be something else at work?
My last TFT test results (after a fix):
FCL: 3.5 - 4.0
Ph: 7.4
Alk: 100
CYA: 30-35
What could most likely be causing this? Could it be completely attributable to the fact that I now sanitize with 8.25% Clorox bleach, like the pool store guy suggested? I think I've eliminated aeration as an issue when I cut my pump operation to 8 hours. Could there be something else at work?
My last TFT test results (after a fix):
FCL: 3.5 - 4.0
Ph: 7.4
Alk: 100
CYA: 30-35