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Thread: TF-100 CH Test

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    Join Date
    Mar 2011
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    TF-100 CH Test

    So yesterday I used the TF kit for the first time (also my first time testing CH) and I wanted to ask and see what kind of "blue" I should be looking for in the calcium hardness test. I think my CH was somewhere around 400, but it was a very gradual color change from red to purple to bluish purple to finally a pale blue with a hint of purple (added 2 - 3 more drops and the small hint of purple didn't change). Is this what I am supposed to be seeing?
    8,700 gallon IG pool (including 2000 gallon spill-over spa), WetEdge Northshore Tahoe (Satin Matrix) finish, Hayward SwimPure Plus T-15, Jandy JXi 260k propane heater, Jandy FloPro 1.5HP 2 speed pump, Jandy CS 150 cartridge filter, TF-100, Borates added, BBB is the way for me!

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    JasonLion's Avatar
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    Re: TF-100 CH Test

    The exact shade of blue varies from pool to pool. The fact that you are seeing purple at all is called a vanishing end point and can throw off the test results. Read through the extended test kit instructions for some suggestions on how to avoid a vanishing end point.
    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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    Re: TF-100 CH Test

    Thank you Jason, I will try that this evening.
    8,700 gallon IG pool (including 2000 gallon spill-over spa), WetEdge Northshore Tahoe (Satin Matrix) finish, Hayward SwimPure Plus T-15, Jandy JXi 260k propane heater, Jandy FloPro 1.5HP 2 speed pump, Jandy CS 150 cartridge filter, TF-100, Borates added, BBB is the way for me!

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    Re: TF-100 CH Test

    Tried 5 drops first last night, still had a fading endpoint. I'll have to try distilled water.

    My guess is that there is lots of copper in the water from the copper/silver ion generator that appears to have been used throughout the pool's entire life. This is probably also the cause of the stains around the pool...
    8,700 gallon IG pool (including 2000 gallon spill-over spa), WetEdge Northshore Tahoe (Satin Matrix) finish, Hayward SwimPure Plus T-15, Jandy JXi 260k propane heater, Jandy FloPro 1.5HP 2 speed pump, Jandy CS 150 cartridge filter, TF-100, Borates added, BBB is the way for me!

  5. Back To Top    #5

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    Location
    Central Florida
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    Re: TF-100 CH Test

    Will using a sequesterant change anything as far as the effects that the metals have on this test?
    8,700 gallon IG pool (including 2000 gallon spill-over spa), WetEdge Northshore Tahoe (Satin Matrix) finish, Hayward SwimPure Plus T-15, Jandy JXi 260k propane heater, Jandy FloPro 1.5HP 2 speed pump, Jandy CS 150 cartridge filter, TF-100, Borates added, BBB is the way for me!

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