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Thread: How inaccurate is pool math when you add borates?

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    How inaccurate is pool math when you add borates?

    From the poolmath site:

    Note: pH calculations are not exact. These numbers are only suggestive of the relative magnitude of the pH change you can expect. Small changes, +-0.4, with pH between 7.2-7.8, TA around 80-120, and Borate near zero will be approximately correct. The further you go from those ranges the less these pH changes will correspond to reality.


    How inaccurate will the numbers be when you have borates at 50? I'm about to have to add some acid to lower the pH since my borate addition, and I'm assuming it will take more acid to do it, but I am unsure how much more...or is that just for the chemical calculation and the top portion of poolmath is going to be more correct?
    17.4k gallon IG pool with attached spa (spa itself is 730gal), Super Blue Diamondbrite plaster, Circupool SI-45+ SWG, BH/Hayward Cartridge Filter, 2hp 2speed Hayward Super II pump, , Jandy Valves, Waterway Skimmers, Rheem 400k Heater, Polaris 360 cleaner, built 2000+-, replastered June 2015, TF-100 kit---Here's my pool test reading history

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    JoyfulNoise's Avatar
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    Re: How inaccurate is pool math when you add borates?

    Doesn't that warning just apply to the "Effects of Adding Chemicals" section? I think it does.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: How inaccurate is pool math when you add borates?

    If you tell PoolMath you have 50 ppm borates it will significantly increase the amount of acid needed to make a given pH change.
    Cheers, Peter
    20,000 gal, 52'x17' kidney shaped IG, Pebble Tec, IntelliPro P6E6VS4H-209L pump. Intellichlor IC40 SWG.
    300 sf Sta-Rite System 3 cartridge filter. Poolvergnuegen 4-wheel suction pool cleaner. TF-100 test kit.

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    Re: How inaccurate is pool math when you add borates?

    PoolMath has calculations in the upper section (such as how much acid to add to lower pH by the requested amount) that account for Borates if they are in the normal 0 to 50 ppm range. The "Effects of adding chemicals" section does NOT account for borates or anything else -- it uses assumed values of CYA, TA, and Borates for its pH calculations.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: How inaccurate is pool math when you add borates?

    Cool, thanks!
    17.4k gallon IG pool with attached spa (spa itself is 730gal), Super Blue Diamondbrite plaster, Circupool SI-45+ SWG, BH/Hayward Cartridge Filter, 2hp 2speed Hayward Super II pump, , Jandy Valves, Waterway Skimmers, Rheem 400k Heater, Polaris 360 cleaner, built 2000+-, replastered June 2015, TF-100 kit---Here's my pool test reading history

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