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Thread: How to Lower my TA

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    Join Date
    Jun 2012
    Jarrettsville, Md

    How to Lower my TA

    This is Mike verifying my e-mail as requested.

    Thanks for your tips. I found the article on lowering total alkalinity interesting, especially since I have a plaster pool. I have been operating a rubber based painted pool for many (20+) years as a volunteer activity and the acid pooling probelem referenced in the article wasn't a consideration.

    Now, however I own a plaster pool. I have always disagreed with the "Myth" of forming an acid column for lowering alkalinity as a detrimental procedure for plaster pools. Thank you for your affirmation of my opinions. Now, I am still looking for an effective way to lower alkalinity without producing an acid column. I've tried the aeration approach as mentioned on your site, however I've not had much success.

    Suggestions?? Thanks in advance for your kind response.
    Built 2007, 16,000 Gal, In-ground concrete with plaster walls 18x34 ft lagoon pool, 3-6 foot depth. Hayward #SP2610X15 Super Pump 1.5 Hp. Hayward #DE-4820 96 GPM DE filter. Salt Water - Aqua Rite (Hayward) Goldline SWG. Pentair Legend Platinum pressure-side pool cleaner. Well water. PoolKeeper water level valve. Flow Rate: 60GPM @ 15PSI Filter inlet. Hayward Ultratemp 110 Heat Pump.

  2. Back To Top    #2

    Join Date
    Aug 2014
    Northern IL

    Re: How to Lower my TA

    How are you trying to aerate?

  3. Back To Top    #3

    TFP Guide

    chiefwej's Avatar
    Join Date
    Jun 2011

    Re: How to Lower my TA

    The first thing to understand is that aeration does not lower TA. What it does do is raise pH without the normal increase in TA. Adding acid will lower pH and TA. Aeration will then raise the pH (with only a small increase in TA).

    Most of the off gassing that makes the process work seems to happen when the pH is low, (in the 7.0-7.3 range). I find most success by dropping the pH to 7.0, then aerating for two or three hours, or until my pH is around 7.3 or so. Then repeating the process over and over until the desired TA is achieved. Once there let the pH go up through aeration to your normal level.
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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