In contrast to most who post about pH changes, our experience is that our pool's pH consistently drifts down over time. It's been my impression, reading on the forum, that this is more common in the Northeast for some reason. During a typical summer I add a couple cups of borax, probably every two to three weeks. The usual signal is that family members complain of stinging eyes, and, sure enough, pH will be back down to 7.2 or so. I bring it back up to around 7.7, and the pattern continues.
TA consistently measures 70 or 80.
Adding the borax isn't a big chore... However, I'm wondering if raising TA somewhat will tend to keep the pH up where I want it. If so, any guesses on how high TA should be? If it's just a matter of going to 100 or 110 (ballpark) I'd be curious to make the experiment. If it's likely to take a lot more than that to see an effect, I probably wouldn't bother for this seasonal pool...
P.S. Chlorination is done with liquid chlorine, so the dropping pH is not from use of stabilized chlorine products.