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Thread: Couple of testing questions.......

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    Couple of testing questions.......

    Mostly curious about FC testing with the TF-100. I understand the extended test results for getting testing down to .2 ppm, but is it possible or wise to save on regent and test for higher levels? Such as using 5 ml of water...would that make each drop of regent value be 1ppm?
    And....can you test for CC WITHOUT testing for FC first?
    Haven't seen this covered and wanted to get a "professional" opinion!
    Thanks!!!
    16,000 IG, SWG, 175 sq. ft. cartridge, 1.5 hp pump, vinyl, Charlotte NC
    TF-100, Pool School, Pool-Calc

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    Join Date
    Aug 2010
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    Dallas, TX
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    Re: Couple of testing questions.......

    Don't bother with the .2 ppm tests. Your pool doesn't require that kind of accuracy. You have to run the FC test to get your CC numbers.

    If you just need a basic idea of where you are at, use the DPD test, the one where you match it to the color blocks. I don't use my FAS-DPD every day.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Join Date
    May 2007
    Location
    Montreal Canada
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    Re: Couple of testing questions.......

    Quote Originally Posted by samiguy
    using 5 ml of water...would that make each drop of regent value be 1ppm?
    Yes. However the margin for error would be much greater, the smaller the sample size the bigger the error.

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    Re: Couple of testing questions.......

    Was curious because at high shock levels (28ppm), was looking for a way to check often without using so much regent. Obvious OTO is not a solution here. Haven't seen it cover and wanted to ask.
    16,000 IG, SWG, 175 sq. ft. cartridge, 1.5 hp pump, vinyl, Charlotte NC
    TF-100, Pool School, Pool-Calc

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    Join Date
    May 2007
    Location
    Montreal Canada
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    326

    Re: Couple of testing questions.......

    It all depends. A 10% error in measuring 5 mL of water sample is significant (and it affects the end result), whereas a 10% error in measuring say a 250 mL is insignificant.

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