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Thread: Question concerning The Pool Calculator

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    meatloaf's Avatar
    Join Date
    Feb 2008
    Gilbert AZ

    Question concerning The Pool Calculator

    Maybe I'm doing something wrong but there seems to be a discrepancy regarding the PH calculations.
    I have 10500 gallons entered in the size box. If I enter a PH of 7.8 in the goal box and 7.9 in the now box, the results say to add 2.4oz of 31.45% MA which I assume will adjust the PH to the goal of 7.8.
    If I go to the Effects of Adding Chemicals area down below and enter 2.4oz of 31.45% MA, the results show a reduction in PH of -0.04. This would result in a PH of 7.86 from the original 7.9.
    Am I doing something wrong? Which is correct? Can somebody clarify this?
    I don't mean to make any waves so don't take this wrong. I know a lot of time and effort was put into The Pool Calculator.
    My pool is a 10,500 gallon (420 Sq Ft ) kidney shape. STA-RITE HRPB30, Sand filter 30" 98 GPM, 1 HP Maxi-Glas 2 pump, BBB Method, Taylor K-2005 test kit, 50 Watt 12V low-voltage pond light illuminates the pool at night for a nice soft glow.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Question concerning The Pool Calculator

    How much acid you need depends on your current TA. The adjusting PH section takes your current TA level into account. The effects of adding chemicals section assumes your TA is around 100.
    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

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