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Thread: tap water with high TA

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    Join Date
    Jul 2012
    Location
    Riverside, CA
    Posts
    51

    tap water with high TA

    We will do a drain and fill to lower CYA. I tested our tap water and found TA 200ppm and CH 200ppm. I always thought we had hard water. But it seems CH is not high but TA is. Could it be the high TA that is causing the scaling problem in our pool? How to deal with it?
    20,000 gallons, IG plaster, probably built in the 80's.
    Filter: Hayward Pro-Grid DE6020, 120 GPM.
    Pump: Magnetek century E-plus, Purex Triton Whisperflow, WFE-4C, 1HP.
    Fountain booster: Century Centurion A O Smith, CAT B848, 1HP.
    Spa booster: G.E. Jacuzzi pump
    Heater: Raypak RP2100 Digital, Low Nox

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    Join Date
    Jul 2010
    Location
    England, UK
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    156

    Re: tap water with high TA

    Your tap water is quite similar in composition to ours. High pH also contributes to scaling. When you have a high TA and a high pH at the same time, then that's likely to be your problem.
    90k litres, outdoor in ground pool, concrete, painted (I hate paint)
    Sta-Rite 5P2R 1.5 Hp pump, undersized sand filter (needs upgrading).

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    Join Date
    Jul 2012
    Location
    Riverside, CA
    Posts
    51

    Re: tap water with high TA

    The ph is 7.5. Isn't it in the right range?
    20,000 gallons, IG plaster, probably built in the 80's.
    Filter: Hayward Pro-Grid DE6020, 120 GPM.
    Pump: Magnetek century E-plus, Purex Triton Whisperflow, WFE-4C, 1HP.
    Fountain booster: Century Centurion A O Smith, CAT B848, 1HP.
    Spa booster: G.E. Jacuzzi pump
    Heater: Raypak RP2100 Digital, Low Nox

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    Vette's Avatar
    Join Date
    Jul 2012
    Location
    Ohio
    Posts
    404

    Re: tap water with high TA

    Punch all your info into the pool calculator and check out the CSI it gives you.
    11,700 gallon 21' round 54" deep all-resin AGP - June 2012
    Waterway 1HP 2-speed pump / 100 sq ft cartridge filter
    Hayward 150,000btu Natural Gas heater
    I use and recommend the TF-100 for testing

  5. Back To Top    #5

    Join Date
    Jul 2012
    Location
    Riverside, CA
    Posts
    51

    Re: tap water with high TA

    The csi is 0.27. Does it mean refilling with my tap water is ok and won't exacerbate the scaling?
    20,000 gallons, IG plaster, probably built in the 80's.
    Filter: Hayward Pro-Grid DE6020, 120 GPM.
    Pump: Magnetek century E-plus, Purex Triton Whisperflow, WFE-4C, 1HP.
    Fountain booster: Century Centurion A O Smith, CAT B848, 1HP.
    Spa booster: G.E. Jacuzzi pump
    Heater: Raypak RP2100 Digital, Low Nox

  6. Back To Top    #6

    In the Industry

    duraleigh's Avatar
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    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,082

    Re: tap water with high TA

    Lower your TA down to 100. (see Pool School) Keep your pH no higher than 7.5 and watch your CH as it will tend to build over time.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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