Is there a certain window of time

[Tredge]

Interesting thoughts.
Maybe your aeration isnt enough? Or maybe you are not maintaining the PH at a low enough level for long enough....since it tends to creep up so quickly maybe its demanding more attention?

My pool is filled and I have the High TA also so I begin my aeration process tonight.

I should also have good numbers today so we can compare notes.

[Rangeball]

Interesting thoughts.
Maybe your aeration isnt enough? Or maybe you are not maintaining the PH at a low enough level for long enough....since it tends to creep up so quickly maybe its demanding more attention?

How long is it recommended to let the water circulate before testing PH? I gave mine a good 19 hours of circulation before testing PH. The water probably turned over 3-4 times, so it should be plenty mixed. I'm thinking the PH was dropping but being offset by the aeration so it stayed more or less stable as the end result.

I added acid this morning. I'll test ph again at noon to see what it did. This will be 5 hours later. If PH is low enough, I'll check alk. If not, I'll add more acid. I'm starting to run low on my alk reagent, and although it only costs $1.69 for another bottle with free shipping, it's a flat $6.99 "handling" fee.

My pool is filled and I have the High TA also so I begin my aeration process tonight.

I should also have good numbers today so we can compare notes.

Sounds great