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Zaggner

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  1. Thank you for the quick reply Chem Geek! From my experience my PH has never dropped below 7.0 when I do this. Since I never experienced such a precipitous drop of my PH (probably because I turn the jets on immediately after adding the acid and have a 24/7 filter pump running), I never understood why acid is to be added in stages. Last night when I added 10 oz of Muriatic acid (31.5%) (my calculations said I needed to add about 15 oz of acid to go from 230 TA down to 80). I ran the jets for 15 minutes and measured about 45 minutes after adding the acid. I went from 220 TA down to 130 and my PH measured at 7.0. I'm now in the process of adjusting it down to my target 80 TA with dry acid in small doses. I've learned a lot over the years by following your posts and advise. I appreciate all the effort you put into helping the pool/spa community keep our water well balanced and safe. THANKS!
  2. I'm hoping someone can help answer this question. I read that in order to lower TA a significant amount, that it needs to be done in stages. My well water is consistently 200-220 TA and 200 CA level. So when I do a fresh fill of my spa (385 gal), I need to lower my TA considerably. I've used dry acid in the past, but am now using muriatic acid. Other than the risk of overshooting it, why is it necessary to reduce the TA in stages (while keeping a target ph)? It's been my practice to add about 10 oz of muriatic acid at once (usually calls for about 13 oz) and then use dry acid to get to the correct balance of TA and PH. I never seem to have a problem with the PH or TA with my method. I dilute the acid in a bucket of spa water before adding it to my spa. Other than the risk of overshooting it, what other risks might I be facing by doing it this way. I read on elsewhere when it comes to reducing TA, patience is a virtue. That's not a virtue that I posses.
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