I was once told that I should not add more than a quart of muriatic acid to my pool in a day. Adding any more would be ineffective. However I have not seen or heard of this advice since. My question is then, how much acid should I add at a time to our 13,500gal pool? In my first testing of the season, my TA is currently 250 (My fill water tested at almost 500, so you can see my frustration.) I know to drop it to a pH of 7 or 7.2 and aerate back up. However, that is was off the scale high too (we have great water here). Suggestions on how much is too much?