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Thread: TA Levels in plaster pool

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    TA Levels in plaster pool

    Hello everyone!

    Should I raise the TA so that the CSI is 0 to a positive number to protect plaster?

    Pool Calculator says 70-90+ and it says a TA of 130 is required for CSI to be just on the positive side without borates and 0 with borates at 40 ppm.

    Right now I am shocking the pool with the following readings:

    FC = 24
    CC = 0
    pH = 7.5
    CH = 260
    CYA = 55
    TA = 90
    Temp = 72
    Borate to be added to 40 as soon as shocking is over.

    Thanks!
    Suley, West Hills, CA
    IG 23000 Gallons with IG Spa Gunite plaster, Pentair Intelliflo VS 3HP, Pentair Clean & Clear Plus 420 Cartridge filter, Teledyne Laars One series 400,000 BTU Nat Gas Heater, Hayward Max Flo 1HP Single Speed Spa pump, Noisy Spa blower, Dolphin Deluxe 4 robotic vacuum.

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    Mod Squad jblizzle's Avatar
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    Re: TA Levels in plaster pool

    I would think you would be better off bumping up the CH and keeping your TA lower to help hold your pH if you are concerned with you CSI. But being a little negative is not that bad I don't think.

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    Jason, TFP Moderator
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    Richard320's Avatar
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    Re: TA Levels in plaster pool

    With 24 FC, your pH is suspect. So don't do anything until the shocking is done and FC is below 10 and you get numbers that can be trusted.

    Anywhere between -0.6 and +0.6 is okay on the CSI.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: TA Levels in plaster pool

    Thanks for the replies....

    It has been a character of the pool that the pH keeps rising with the TA lurking around 90-100. I noticed that last year soon after i brought the house.

    How are TA and pH related? The lower TA the higher pH?

    Thanks!
    Suley, West Hills, CA
    IG 23000 Gallons with IG Spa Gunite plaster, Pentair Intelliflo VS 3HP, Pentair Clean & Clear Plus 420 Cartridge filter, Teledyne Laars One series 400,000 BTU Nat Gas Heater, Hayward Max Flo 1HP Single Speed Spa pump, Noisy Spa blower, Dolphin Deluxe 4 robotic vacuum.

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    Mod Squad jblizzle's Avatar
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    Re: TA Levels in plaster pool

    TA is a buffer for pH. If TA is too low tgw pH can swing wildly. If TA is too high it will pull the pH up.

    If you are constantly fighting to hold pH down. Try lowering TA using the process described in pool school.

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  6. Back To Top    #6

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    Re: TA Levels in plaster pool

    Thanks!

    That explains a lot!
    Suley, West Hills, CA
    IG 23000 Gallons with IG Spa Gunite plaster, Pentair Intelliflo VS 3HP, Pentair Clean & Clear Plus 420 Cartridge filter, Teledyne Laars One series 400,000 BTU Nat Gas Heater, Hayward Max Flo 1HP Single Speed Spa pump, Noisy Spa blower, Dolphin Deluxe 4 robotic vacuum.

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