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Thread: Add too much FC reagent for FAS-DPD

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    Whatrymes's Avatar
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    Add too much FC reagent for FAS-DPD

    Will adding to much 0871 (FAS-DPD reagent) throw the results off when I add the 0003
    (CC reagent)? I was testing for FC and after 10 drops the solution APPEARED clear, but I wasn't sure so I added another drop. There was no change and then I checked for CC and got a solid zero.
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    JasonLion's Avatar
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    Re: Add too much FC reagent for FAS-DPD

    Using extra drops in the FC phase, beyond what is actually needed, will cause the test to read CC lower than actual, assuming CC is above zero.
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    Whatrymes's Avatar
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    Re: Add too much FC reagent for FAS-DPD

    Quote Originally Posted by JasonLion
    Using extra drops in the FC phase, beyond what is actually needed, will cause the test to read CC lower than actual, assuming CC is above zero.
    That's what I was afraid of. I usually get a small CC reading, this time it was clearly zero.
    15 X 30 X 3.6 Ester williams AGP
    10,800 gallons
    Haywood EC40C90 DE filter 1 HP pump
    TF-100 Test Kit

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    Whatrymes's Avatar
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    Re: Add too much FC reagent for FAS-DPD

    I forgot to ask: If I'm not sure that all the pink is gone, should I add another drop? Which direction should I err?

    Thanks again
    15 X 30 X 3.6 Ester williams AGP
    10,800 gallons
    Haywood EC40C90 DE filter 1 HP pump
    TF-100 Test Kit

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    JasonLion's Avatar
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    Re: Add too much FC reagent for FAS-DPD

    If you aren't sure if the pink is completely gone on the FC phase, add one more drop. If the color does not change count that drop as a CC drop.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Whatrymes's Avatar
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    Re: Add too much FC reagent for FAS-DPD

    OK, I see what your saying, thanks!
    15 X 30 X 3.6 Ester williams AGP
    10,800 gallons
    Haywood EC40C90 DE filter 1 HP pump
    TF-100 Test Kit

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