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Thread: TF-100 Question

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    Join Date
    Aug 2015
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    TF-100 Question

    Does anyone know what exactly the TF-100's CH reagents test for?

    Is it just calcium (without magnesium)?

    Is it total hardness (as CaCO3)?
    Curtis- 20k gallon IG gunnite/plaster with hot tub/waterfall and "grotto"
    All Jandy equipment: 60sqft DE filter - 399k btu natural gas heater - Stealth pumps - iAquaLink RS8.
    Polaris 9400 on patrol.
    TF-100 in da house/TFP method in effect: FC=4-6, pH=7.5, TA=80, CH=250, CYA=50, Borate=50, CSI=-0.21

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    Mod Squad JVTrain's Avatar
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    Re: TF-100 Question

    It's testing only calcium hardness, as dissolved CaCO3. The R-0010 reagent prevents Magnesium interference.

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    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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  3. Back To Top    #3

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    Re: TF-100 Question

    Isn't CaCO3 an expression of the concentration of hardness ions in terms of their equivalent value of calcium carbonate? If so, wouldn't that include magnesium ions as well? If this is the case, I don't think this could would give an accurate count of calcium ions alone.
    Curtis- 20k gallon IG gunnite/plaster with hot tub/waterfall and "grotto"
    All Jandy equipment: 60sqft DE filter - 399k btu natural gas heater - Stealth pumps - iAquaLink RS8.
    Polaris 9400 on patrol.
    TF-100 in da house/TFP method in effect: FC=4-6, pH=7.5, TA=80, CH=250, CYA=50, Borate=50, CSI=-0.21

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