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Thread: High TA and eating Chlorine

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    Join Date
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    High TA and eating Chlorine

    FC - 7
    cc - .5
    CYA- 35-40
    TA - 150
    PH - 7.6

    My TA is a little high, is this anything to be concerned with? I am also going through 1 gallon of 12.5% a day, not sure if they are related. Water is clear and everything seems fine. I also just hooked up a pool heater and started running the water through that, don't think that matters. Thanks
    21,000 gallon IG with vinyl liner, Pentair sand filter, TF100 test kit, pool is about 15 years old.
    new in 2016 - Hayward SWCG with T15 cell

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    Mod Squad pooldv's Avatar
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    Re: High TA and eating Chlorine

    TA is not related chlorine consumption. High TA can cause your PH to rise. Keep PH between 7.2 and 7.8. When it get to 7.8 add muriatic acid to lower it to 7.2. This will slowly reduce your TA. Or you can actively reduce TA by following this process, Pool School - Lower Total Alkalinity

    A gallon of 12.5% chlorine adds 6 ppm to 21k gal. That is a little higher than the normal 2-4 ppm per day. Increasing your CYA to 50 will help with FC loss to the sun.
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    Divin Dave's Avatar
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    Re: High TA and eating Chlorine

    pooldv is spot on as usual. Only thing I can add, is that you might want to do a OCLT just to make sure there isnt something organic that isnt yet visible, thats eating some of your chlorine.
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

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    Re: High TA and eating Chlorine

    The pool normally has a lot of organics in it each day, leaves, toads, worms, etc. I clean them out each day but with all the rain we have been getting stuff is still getting in. It was a lot worse a month ago when everything was pollinating, the robot couldn't even keep up running it every day. Thanks for the input.
    21,000 gallon IG with vinyl liner, Pentair sand filter, TF100 test kit, pool is about 15 years old.
    new in 2016 - Hayward SWCG with T15 cell

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    Mod Squad pooldv's Avatar
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    Re: High TA and eating Chlorine

    The extra organics you mention could certainly account for the extra couple ppm of chlorine consumption. Especially the toads, they don't get out of the pool to pee unless you train them first.
    TFP Moderator
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