I have a 20k gallon vinyl IG pool and the pH keeps rising. Any ideas as to why? I had to reduce TA and was aerating a lot which is why it was rising in the first place but I stopped that about a week ago and it still continues to rise.
Here are my particulars
FC-3.5ppm (use a Liquidator with 5.25% bleach)
pH-7.8 (was 7.2 four days ago after the addition of some acid)