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Thread: Low Ca and high TA

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    JenMichelle's Avatar
    Join Date
    Apr 2014
    Location
    St. Louis
    Posts
    65

    Low Ca and high TA

    I'm a new pool owner and just really want a little reassurance on my test results. I use th TF 100 test kit. I am a little concerned with the high TA and low Ca.

    Cl 5.5
    Cc 0
    Tc 5.5
    TA 150
    Ph 7.8
    Ca 50 or 75
    Cya 55

    It seems the ph slowly keeps rising in my pool. I have had no problems this year except for metal staining and did refills for high cya due to old house owners using pucks. Should I add acid to lower the TA? Thanks guys!
    24' x 52" AG / Hayward Sand Filter
    Hayward Power-Flo 2 Speed Pump
    TF100 test kit / Pool Rover Hybrid Robot
    St. Louis, MO *GO CARDINALS*

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Low Ca and high TA

    You should only adjust TA if you are actually having a problem. If your PH is going up annoyingly quickly, then lower TA.

    There is never any need to raise CH levels in a vinyl liner pool.
    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

  3. Back To Top    #3
    JenMichelle's Avatar
    Join Date
    Apr 2014
    Location
    St. Louis
    Posts
    65

    Re: Low Ca and high TA

    My ph is going up from 7.3 ish to 7.8 within 7 days or so. I guess I will wait and see if it keeps happening! If so I will adjust. Thanks for the quick reply ��
    24' x 52" AG / Hayward Sand Filter
    Hayward Power-Flo 2 Speed Pump
    TF100 test kit / Pool Rover Hybrid Robot
    St. Louis, MO *GO CARDINALS*

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