I am not in your area with your fill water, but I think raising TA and dropping PH becomes a see saw chemical addition? Many drop their TA down to 50 or 60 before the PH rise stabilizes.
Good thing @JoyfulNoise kept it in layman’s terms or I may have gotten a headache! 🤣😩🤣
Seriously though, thanks for knowing all that and taking the time to help out here!