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Thread: How do I reduce TA

  1. Back To Top    #1

    Join Date
    Mar 2016
    Spring, Texas

    How do I reduce TA

    Moderator comment: This post was separated out from another thread:

    Quote Originally Posted by camueller View Post
    I used the aeration method to lower my TA and get my pH at 7.5. By the time I got my TA down to around 60, getting my pH up to anything above 7.4 was a struggle. Even with 48 hours of aeration it didn't budge. That was a pretty good indication there that I was stable, so I quit and kept an eye on the pH over the next 2 weeks. It never moved. At all. I felt like that was stable. So, I added borates via borax and MA (in hindsight, order boric acid, the calcium precipitating out of the water due to the borax clogged my sand filter overnight) and when done found my pH was high at 8. I knocked it down to 7.5 with more MA and 3 weeks have passed, but my pH hasn't moved.
    This is SOOOO what I am looking for! How EXACTLY did you do this? I need steps. For dummies. I am dumping 16oz of muratic acid in DAILY trying to keep my PH at 7.6. I have high PH fill water (8.2+), and new plaster, and lots of aeration from a SPA spillover running 12 hours a day (when the filter is running). Regardless of TA (I've gone from 60-110 and I STILL see a .2 rise in PH *DAILY*). Working on dropping my TA back down now since I've ruled out "low TA" AND "high TA" as a cause for the constant PH movement.

    I assume it's just acid to drop the PH down to ??? 7.2ish? And then aerate like crazy (in addition to the SPA spill over I have waterfalls I can turn on to help aerate)? Let the PH get back up to?? 7.8 and drop back to 7.2? Later, rinse, repeat until the PH quits moving?

    Any risk of going too low on the TA (like 0?)?? And still seeing PH rise? Is there some 'safe' minimum I should give up the experiment at not to cause serious trouble in the pool?
    21000 gal IG Pebble Sheen (Blue Surf), Pentair quad DE filter, Sta Rite Intellipro VS pump; Paramount PCC-2000 inground cleaner; Installed May 2016.

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Columbia, SC

    Re: How do I reduce TA

    Pool School is always the first place to look:

    Pool School - Lower Total Alkalinity

    My pool is very happy with TA around 50.

    But, with new plaster yo will be fighting pH rise for a while.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  3. Back To Top    #3
    Mod Squad
    Join Date
    Aug 2012
    DFW, TX

    Re: How do I reduce TA

    50 is the lowest your should go. Some pools need to be 60.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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