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Thread: Pool math ?

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    Join Date
    Sep 2013
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    Pool math ?

    I want to lower my TA by adding muratic acid, but the pool math calculator says NaN for amount. Why is that? My TA is extremely high, like 290. My PH is high too, 8.2 is the highest reading on my current drop test and we are in that zone. My TFT-100 should show up at the end of next week (I hope!).
    Intex Ultra Frame 14' X 42" AG, 4000 GAL, Intex 56671EG 2,650-Gallon Sand Filter Pump and Intex 54605EG Krystal Clear Saltwater System

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    JasonLion's Avatar
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    Re: Pool math ?

    If you haven't already, read the instructions for lowering TA in the How To section of Pool School.

    Which field says NaN? What do you have the various fields set to? You haven't given us enough information yet for me to duplicate your results.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Pool math ?

    Sorry for the lack of information. I played with it some and I guess it doesn't like a Borate reading of 0 or .5. Our drop test shows very little, but if I moved it to a reading of 1 then it gave me a calculation for adding borax and muratic acid. Do you know a goal range for borate for an AG vinyl pool? I don't see that in the listing of ranges for the different pools.
    Thanks for your help!
    Intex Ultra Frame 14' X 42" AG, 4000 GAL, Intex 56671EG 2,650-Gallon Sand Filter Pump and Intex 54605EG Krystal Clear Saltwater System

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    Mod Squad jblizzle's Avatar
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    Re: Pool math ?

    I think you have the wrong numbers in the NOW and TARGET columns. No problem with borates equal 0.
    Jason, TFP Moderator
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    Richard320's Avatar
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    Re: Pool math ?

    Use the letter O instead of the number 0 and you will get NaN. My guess is Not a Number.
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