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Thread: Lowering TA and raising PH

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    Lowering TA and raising PH

    A week ago my TA was a bit high at 120 & PH was 7.7. I wanted to lower TA so i added the appropriate MA & TA was then 110 & PH 7. I aerated for a week & PH raised to about 7.2 (didn't increase much). I then added MA tonight according to calculator for PH to 7.0 , but will not test TA again till morning. My issue is the TA should be lower again but it is taking such a long time to get PH to rise with this aeration. Would adding borax raise the PH up but not raise TA up much or will borax just raise TA up also?
    Lizzieann,

    27x54 AGP with Waterfall, 18,500 gallons, Waterway Sand filter- Waterway 1.5 hp -1 speed pump , TF-100 test kit, BBB method.

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    Mod Squad jblizzle's Avatar
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    Re: Lowering TA and raising PH

    Why are you on a hurry to lower the TA?
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    Re: Lowering TA and raising PH

    Not in a hurry necessarily, just trying to get to my target numbers. I want Ph where it should be for swimming purposes
    Lizzieann,

    27x54 AGP with Waterfall, 18,500 gallons, Waterway Sand filter- Waterway 1.5 hp -1 speed pump , TF-100 test kit, BBB method.

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    Richard320's Avatar
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    Re: Lowering TA and raising PH

    Fire off the waterfall. That ought to drive pH up in a hurry.

    And then just maintain pH using the TA reading to help calculate the acid dose. TA will slowly come down on its own.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: Lowering TA and raising PH

    Ok, so basically you are saying i don't need to worry about TA being a little high (100-120) if my PH levels are staying around 7.5. & 7.7 ?
    Lizzieann,

    27x54 AGP with Waterfall, 18,500 gallons, Waterway Sand filter- Waterway 1.5 hp -1 speed pump , TF-100 test kit, BBB method.

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    Re: Lowering TA and raising PH

    When I need to lower my TA I tend to lower my ph to 7.2, still swimmable, and when it climbs up to 7.7, dose again to bring it back down until I reach desired TA. It takes some time, but it's not something that has to be done quickly. When your TA is in check, your ph won't fluctuate as much.
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    Richard320's Avatar
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    Re: Lowering TA and raising PH

    Quote Originally Posted by Lizzieann
    Ok, so basically you are saying i don't need to worry about TA being a little high (100-120) if my PH levels are staying around 7.5. & 7.7 ?
    Yep.

    High TA is only a real problem if you have high CH as well, because the combination drives the Calcium Saturation Index high, which leads to scaling.

    High TA will tend to cause pH to climb rapidly. In which case you just lower it with acid. It's exactly
    the same process you're doing with the aeration, just not at a forced rate.
    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.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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