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Thread: New Pool PH rising fast

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    Join Date
    Jan 2011
    Location
    Austin, TX
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    30

    New Pool PH rising fast

    We have a 19K gallon SW pool with grey plaster. Our 2 month old pool requires a quart of muriatic acid every 2 to 3 days in order to keep the PH balanced. I know that new pools require acid to keep balanced but this seems like quite alot.
    Is a gallon of acid a week a reasonable amount? When can I expect this to slow down? I have been told that SW pools always require acid is this true?
    Thanks in advance.
    BlueBell
    Austin, TX
    19K gallons, 500 approx sq. ft. pool, 33' x 16', outdoor, inground, med. grey plaster interior, gunite, hayward tristar 1 speed pump, perimeter 95

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: New Pool PH rising fast

    That amount of acid is only a little high for 2 month old plaster. Fresh plaster requires a lot of acid for the first three or four weeks, and some acid for up to a year.

    Some of the acid demand might be from other things. If you post a full set of water test results we might spot something that you could adjust to get the acid demand down.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

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    Jan 2011
    Location
    Austin, TX
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    Re: New Pool PH rising fast

    FC 2
    CC 0
    PH 7.4
    hardness 245
    T/A 50
    CYA 80
    Salt 3300.
    Temp 75

    Thanks
    BlueBell
    Austin, TX
    19K gallons, 500 approx sq. ft. pool, 33' x 16', outdoor, inground, med. grey plaster interior, gunite, hayward tristar 1 speed pump, perimeter 95

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: New Pool PH rising fast

    Your numbers actually look quite good. The acid demand must be mostly coming from the plaster. I would adjust the FC level up a little, 2 is fairly low with CYA at 80.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. Back To Top    #5

    Join Date
    Jan 2011
    Location
    Austin, TX
    Posts
    30

    Re: New Pool PH rising fast

    Thanks alot. I guess I just wanted some reassurance that we weren't doing something drastically wrong.
    I really appreciate this site and all the help.
    Thanks again.
    BlueBell
    Austin, TX
    19K gallons, 500 approx sq. ft. pool, 33' x 16', outdoor, inground, med. grey plaster interior, gunite, hayward tristar 1 speed pump, perimeter 95

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