Venams Posted March 16, 2015 Report Share Posted March 16, 2015 I've been using Muratic and Boric Acid acid to bring down the TA/PH of my tub water the past few fills. Always works perfect and I get TA about 50ppm with PH around 7.5 This time I added 3 cups of Boric Acid just prior to my last dose of Muriatic. My TA is between 50 and 60pmm but my Ph was low after I was done, at about 7.1 I tried aerating for an hour or so and PH is now at about 7.3 and doesn't appear to be moving higher. Did I screw up by adding the Boric Acid before I was done with the Muriatic? If so how can I fix this or should I just leave it sit at 7.3 and wait for it to rise? Quote Link to comment Share on other sites More sharing options...
chem geek Posted March 17, 2015 Report Share Posted March 17, 2015 Boric acid does not bring down the pH, at least not very much, because it is a very weak acid. I presume you mean that you add the boric acid to get to 50 ppm Borates and that in doing so it lowers the pH a little (say from 7.5 to 7.2) and if for some reason the pH is still too high then you add some acid. You can just wait for the pH to rise which it will likely do though perhaps slowly. That's not a problem. Usually you do the acid/aeration to lower the TA before you add the boric acid because it's easier to see the pH change for when to add more acid before you increase borates. It's not a big deal to do it the other way around. Quote Link to comment Share on other sites More sharing options...
Venams Posted March 17, 2015 Author Report Share Posted March 17, 2015 Yep. That's what I meant Chem Geek and thanks for the info. I'll most likely just leave it alone for now and wait for it to rise Quote Link to comment Share on other sites More sharing options...
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