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Thread: TA Testing Question

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    TA Testing Question


    What is the difference between Total Alkalinity and Adjusted Total Alkalinity? I had my water tested today at the pool store and the TA was 75 and ATA was 54.

    My other numbers were

    CYA 70
    TC, FC 5
    PH 7.4
    THardness 94
    Salt 3100

    Thanks to anyone who explains. I have the Taylor test kit and the numbers were comparable.
    2008 23K IG Liner, Pentair intellipump vf, 48DE filter, Heatpump, SWC, aquabot turbo T, K2006 Testkit

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    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: pool please

    Split to form new topic.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    Perfectly Clear Pool Service, Find me on Facebook!

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: TA Testing Question

    At TFP we always use TA directly from the test.

    Adjusted total alkalinity is used in the calculation of the Langelier saturation index (LSI). If you aren't trying to figure out your LSI, there really isn't any need for Adj TA.

    If you really want to know exactly what is going on with Adj TA, read this topic, where we go into Adj TA in way too much detail.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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