Quote Originally Posted by sspine
Have added muratic acid to lower TA, when do I retest?
Hi, and welcome to the forum! You've made a great choice in taking a proactive roll in your pool and by comming here to get advice on how to do it, properly ! The 'plug' of acid method for lowering total alkalinity has been debunked by the operator of this site(Ben/ Pooldoc), go to the second thread in the "dealing with alkalinity and calcium" topic (it's stickied)' for the low down on how to really lower alkalinity with acid.

As a general question of 'how long should I wait to retest aftere adding something'; the answer is, 1 turnover. A 'turnover' is the amount of time you need to run the pump to have the gallonage of your pool pass through the filter. There are some great folks who regularly post here that can tell you an ~ exact #, if they know the size of your pool, what pump and filter you have, and a few other details about your plumbing. (for a 'quick and dirty' # - about 4 hrs. with the pump running should give you a good idea of what the change has been )