Ok, good - so this clarifies the situation for our pool, which is just the opposite - I do NOT want to aerate my pool as it will make my PH rise, its too high already, I want my TA and PH to both go down so acid is the answer for me. It was just explained to me but a bit different route in another thread on TFP and this seals it. Good to know. (BTW, it likely got that high due to 10" plus of rain in the last 2 wks, the salt and the bleach - TA started out on the high end)