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Thread: Raising TA w/o raising PH?

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    Raising TA w/o raising PH?

    So yesterday I did my monthly full test:

    PH 8.0
    FC: 5
    TC: 5
    CC: 0
    CYA: 30
    TA: 70
    CH: 200

    I added a couple of cups (2 or 3, I didn't measure, just glugged it out of the bottle) of muriatic acid. Tested again today and got:

    PH: 7.4
    TA: 30

    So, now I need to raise my TA, right? Isn't baking soda going to just raise my PH too, then I'll add acid to lower PH and destroy my TA and end up in the same spot? I have soda ash too, if that is better.....Help!!
    IG Plaster 20,000gal, attached spa w/ spillover, hayward C12002 cart filter, 1 1/2hp pump w/ polaris 360
    6/16/12 - PH 7.6, FC 6, CC 0, CYA 30, TA 80, Calcium 310

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    Butterfly's Avatar
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    Re: Raising TA w/o raising PH?

    First, retest TA wiping the dropper between drops. If still low, then:

    Use baking soda and get your TA up to recommended levels. It will raise pH, but only slightly. You can use MA to lower the pH again - if needed.

    Use the PoolCalculator.com to determine doses.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    Re: Raising TA w/o raising PH?

    What are you using to chlorinate your water? I use to worry about "lower range" alk but found that it would always sit there no matter what, I compensated by increasing my calcium hardness a bit to keep CSI near 0. Don't forget to use the pool calculator to get accurate dosage, and also make sure to measure the amounts you put in rather than guessing so you don't need to add addition chemicals. Good luck.
    69,000 Gal gunite indoor IG pool.
    5 HP Emerson - Pentair Triton II Commercial TR140c Sand Filter x2
    5,000 Gal gunite outdoor IG hot tub
    2 HP Sta-Rite - Pentair Triton II Commercial TR140c Sand Filter

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    Re: Raising TA w/o raising PH?

    You won't need to wipe the dropper tip. That tip is for a VERY new kit and when the TA measures UNUSUALLY high. Yours is, of course, too low.

    As BF says, Baking soda will bring your TA up where it belongs and I doubt you will even be able to measure the SLIGHT change in pH.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Raising TA w/o raising PH?

    OK, I'm a dope, LOL. As I was re-doing the TA test, I realized when I got that 30 reading, I'd only filled the tube up to 10ml, like I was doing a CL test. It's fine....back to 70. I'm so glad I didn't dump a bunch of stuff in the pool before posting Thanks butterfly!!!
    IG Plaster 20,000gal, attached spa w/ spillover, hayward C12002 cart filter, 1 1/2hp pump w/ polaris 360
    6/16/12 - PH 7.6, FC 6, CC 0, CYA 30, TA 80, Calcium 310

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    Butterfly's Avatar
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    Re: Raising TA w/o raising PH?

    Quote Originally Posted by danivdp
    OK, I'm a dope, LOL. As I was re-doing the TA test, I realized when I got that 30 reading, I'd only filled the tube up to 10ml, like I was doing a CL test. It's fine....back to 70. I'm so glad I didn't dump a bunch of stuff in the pool before posting Thanks butterfly!!!
    Don't ask me why I KNOW you should always step back and retest FIRST

    You are NOT the only one to make that little mistake
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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