My PH goes from 7.4 to 8.0 Every night, If add PH decreaser in the morning to get it back to 7.3 /7.4 range it stays all day without going up but maybe to 7.5. But in the morning it will be right back at 8.0. I have a digital PH meter calibrated perfectly to 4.0 and 7.8 and double check with the test kit.
Here are my numbers after a heavy bather load yesterday ( 20 + ) I added the same amount of PH decreaser last nite that I always have to add so it was at 7.6 this morning.
Salt 3200 PPM
Ozone Generator on all the time.
Chlorine Generator set to 30%
Water Temp 90
Air Temp 70
25,000 Gal Plaster Pool.
I only operate the Waterfall if we are in the pool so its off 90% of the time.
Water in Pool for about 1 Month.
The PH has been Bouncing up and down like this since we filled the pool, Never has been below 7.2 but is usually 8.0.
What should I try to keep the PH a little more stable?