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Thread: TF-100 reads total chlorine 0

  1. Back To Top    #1

    TF-100 reads total chlorine 0

    Is it possible for pool to look "crystal clear" and have total chlorine read zero? Pool looks great but.......I am waitng for conditioner to come to raise cya to 70...

    fc-0
    tc-0
    ph-7.5
    ta-60
    ch-330
    cya-40
    24,500 gallon plaster i/g
    sand filter (Hayward S-200)

  2. Back To Top    #2

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: TF-100 reads total chlorine 0

    Yes, but it won't stay that way for long! Get some bleach in there soon!

    Why do you want to raise the CYA, do you have a SWG?
    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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  3. Back To Top    #3

    Re: TF-100 reads total chlorine 0

    Yes I have a SWG...Do you think I should shock beacuse FC-0 or am I losing FC due to low CYA?
    24,500 gallon plaster i/g
    sand filter (Hayward S-200)

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: TF-100 reads total chlorine 0

    I recommend manually raising the FC level today, doing an overnight FC loss test to rule out algae tonight, and only after the possibility of algae is eliminated raising CYA up to the recommended 70 to 80.

    Your SWG might be able to keep up with CYA that low, or it might not. To have any chance of keeping up you will need to turn up the percentage fairly high. While figuring that out, make sure to add chlorine manually as needed to keep FC from getting to zero or you will have more serious problems.
    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

  5. Back To Top    #5

    Re: TF-100 reads total chlorine 0

    Thank You
    24,500 gallon plaster i/g
    sand filter (Hayward S-200)

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