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Thread: water balance and TA/PH questions

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    water balance and TA/PH questions

    today's test results
    FC=2.5, CC=0, PH=7.8, TA=70, CH=240, CYA=35, water temp 78
    water balance is +.15

    so all is good....but since my TA is below normal recommended range of 80-100, should I increase TA or just leave it be? I did add some muriatic acid yesterday since the ph was pushing 8.0 and I guess that lowered the TA too.
    I am thinking just do nothing while water balance is in range?

    also another question
    when I do start raising the TA...I usually use baking soda......but that raises the PH.....then if I use muriatic to lower the PH...that lowers the TA....is there a better way?

    thanks.
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    BoDarville's Avatar
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    Re: water balance and TA/PH questions

    Total alkalinity indicates the water's ability to buffer pH changes. If the pH is relatively stable, I would not fiddle with TA just to reach a target number. Your pool's pH is on the high end of the recommended range and will need to be lowered if it gets any higher. Muriatic Acid will lower both pH and TA as you have correctly surmised. If TA does get too low (say below 60) it can be increased with baking soda.
    ...I usually use baking soda......but that raises the PH...
    Actually, baking soda has virtually no effect on pH.
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    pwrstrk's Avatar
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    Re: water balance and TA/PH questions

    I agree with Bo.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: water balance and TA/PH questions

    Lots of conflicting info out there about baking soda also raising PH so thanks for your opinions
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    duraleigh's Avatar
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    Re: water balance and TA/PH questions

    You should disregard any info you read about baking soda raising pH....it doesn't.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    pwrstrk's Avatar
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    Re: water balance and TA/PH questions

    + 1


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Butterfly's Avatar
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    Re: water balance and TA/PH questions

    You can use the "Effects of Adding Chemicals" section, near the bottom of the PoolCalculator, to help predict results.
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    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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