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Thread: Calcium Hardness Test

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    klavant's Avatar
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    Jun 2008
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    Calcium Hardness Test

    I just took a CH reading and noticed something unusual. After adding and mixing the R11, the water sample turned clear/red but had red "particles" floating in it as well. i would have expected the solution to be relatively clear. After adding the R12, the water sample turned clear/blue as expected and the "particles" as well.

    Could something be wrong with my reagents or water? TFT-100 Kit was ordered in May. Water tests and looks fine.

    FC=2
    CC= >.5
    PH=7.5
    TA=110
    CH=240
    Kurt
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    Guest

    Re: Calcium Hardness Test

    No, that is normal with water that has either high magnesium or metals in it. This can be minimized or eliminated by swirling for 20-30 seconds after adding the first reagent and swirling 20-30 seconds between EACH drop of titrant. If you do this test properly it takes a while.

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    klavant's Avatar
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    Re: Calcium Hardness Test

    Are either of those conditions something to worry about? And the test results are still reliable, correct?
    Kurt
    _______________________
    9,600 Gal. AG Vinyl
    Hayward C900 Cart filter
    2 speed pump (0.5/2.0 HP)

  4. Back To Top    #4
    Guest

    Re: Calcium Hardness Test

    If you are getting a distinct endpoint it's nothing to worry about. It's actually somewhat normal if you are not using a magnetic stirrer for the test.

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