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Thread: TF-100 - Couple questions!

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    ian81's Avatar
    Join Date
    Aug 2012
    Jenison, MI

    TF-100 - Couple questions!

    Hey guys! got my kit and my pumps been operating for about a week now. Had a few questions regarding the colors, and my FC.

    FC 11
    CC 0
    TC 11
    TA 130
    PH 7.5
    CYA 50
    CH 300

    So, is this "red" for my alk?

    and is this blue for my CH?

    or am i looking for darker shades

    Also I am kind of confused on the OFCLT is all about. Do I test my water before bed(2am), and then when I wake up?(9am) and when I don't lose any FC over night, the shock process is done? I raised FC to 25 when I opened pool about a week ago and now it's down to 11, I haven't added anything else as I have been really short on time.
    So should I check the FC night to night, or crank it back up to 25 again cause I am not done shocking?
    Thanks for the help! Love this site
    18k gal. 16x32 IG cement painted
    Hayward DE EC-65

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: TF-100 - Couple questions!

    Yes, that is red. Any shade in the red/pink family is fine. The main thing is to continue adding drops after the color starts changing, and then stop adding stops when some drop doesn't change the color any further. That final drop which doesn't change the color any further doesn't count.

    Yes, for the OFCLT you measure in the evening and then again in the morning, the idea being to get a long period when no sunlight is striking the pool. Any chlorine you lose in the absence of sunlight is caused by organics in the water.

    While you are not done shocking and should add chlorine back up to shock level, that has nothing to do with the OFCLT, which will work just fine at your current FC level.
    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

  3. Back To Top    #3
    BoDarville's Avatar
    Join Date
    Jun 2012
    DFW, Texas

    Re: TF-100 - Couple questions!


    Here are some more detailed instructions/guidelines on testing:

    What Jason said on performing the OFCLT/OCLT. As long as your morning test takes place before sunlight hits the pool, you're good.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
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