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Thread: High TA and Low pH. How to fix?

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    JamesR's Avatar
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    High TA and Low pH. How to fix?

    Friends AGP, vinyl liner, 12K gallon
    CYA = 50
    FC = 5
    CC = 0
    CH = 300
    Ph = 7.2
    TA = 120

    No way to aerate that I can see. Your basic one wall return and one skimmer. How would someone reduce that TA down to 80 without dropping the pH even lower? is 120 bad for an AGP?
    28K gallon, raised beam, plaster/ceramic color quartz with attached spa. TF-100 test kit
    Hayward 1.5HP super pump, DE4800 DE filter, Hayward inline chlorinator w/3" tabs (off)
    Pool: 2 floor drains, 2 skimmers, 3 floor returns, 2 wall returns, 3.5' deep > 8' deep
    Spa: 2 floor drains, 4 jet returns

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    Mod Squad jblizzle's Avatar
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    Re: High TA and Low pH. How to fix?

    There is no real reason to worry about TA. Just keep the pH in the 7s and the TA should balance itself out.

    Some people make PVC fountains to spray the return water into the air to aerate to raise the pH. If there was a desire to do so.

    No reason to worry about the higher TA unless you are bored and looking for something to do.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    JamesR's Avatar
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    Re: High TA and Low pH. How to fix?

    No, not bored,...got plenty of stuff to do. Just trying to help her get everything balanced and squared away. I will let her know to just leave it be and continue her weekly testing. She borrowed my TF-100 kit for a while for pool opening/start-up. Liked it so much she bought her own, with speed stir also.
    Thanks,
    Jim
    28K gallon, raised beam, plaster/ceramic color quartz with attached spa. TF-100 test kit
    Hayward 1.5HP super pump, DE4800 DE filter, Hayward inline chlorinator w/3" tabs (off)
    Pool: 2 floor drains, 2 skimmers, 3 floor returns, 2 wall returns, 3.5' deep > 8' deep
    Spa: 2 floor drains, 4 jet returns

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    Re: High TA and Low pH. How to fix?

    Is she using Trichlor? Usually you don't get a low pH with a higher TA unless some acidic chemical is being added such as Trichlor or non-chlorine shock (MPS) or even Dichlor. The TA usually drops over time, but someone may be adding baking soda to keep it up.

    Maybe she doesn't have much aeration or had a pool cover on the pool which prevented outgassing.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    JamesR's Avatar
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    Re: High TA and Low pH. How to fix?

    She did put on a solar cover the other day, would that have done it?
    As far as the Trichlor or Dichlor, I will ask her if she has added any shock to it. I told her to use 8.25% bleach as her choice of chlorine for maintenance and shock if needed.
    28K gallon, raised beam, plaster/ceramic color quartz with attached spa. TF-100 test kit
    Hayward 1.5HP super pump, DE4800 DE filter, Hayward inline chlorinator w/3" tabs (off)
    Pool: 2 floor drains, 2 skimmers, 3 floor returns, 2 wall returns, 3.5' deep > 8' deep
    Spa: 2 floor drains, 4 jet returns

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    Re: High TA and Low pH. How to fix?

    Yes a pool cover could lock in the pH in spite of the higher TA so perhaps that was it and the pH might have been low from some product she used.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Richard320's Avatar
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    Re: High TA and Low pH. How to fix?

    The simplest way to get a lot of aeration is to throw some kids in the pool with some paddleboards.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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