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Thread: TF100 new user - FC reading way different from Pool Store

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    TF100 new user - FC reads much lower than Pool Store

    I am new to this site, great info. I have cloudy water. My test for FC using TF100 says about 1.5 and the pool store says 12. What am I doing wrong? I have used more DPD Power for test and got the same results. On the OTO test I can see it is over 5. Help plz.
    40K gal, vinyl, 1 1/2 Starite pump, Sta-rite cartridge filter, tiger shark cleaner

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    TF100 new user - FC reading way different from Pool Store

    I am new to this site, awesome place. I just got my TF100 and compared my numbers to my pool store. All my number are close except the FC I have 2 and they have 12. What am I doing wrong?
    40K gal, vinyl, 1 1/2 Starite pump, Sta-rite cartridge filter, tiger shark cleaner

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    duraleigh's Avatar
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    Re: TF100 new user - FC reading way different from Pool Stor

    What am I doing wrong?
    Going to the pool Store!!

    Always, Always trust your own testing. I assume you are doing the FAS/DPD test for chlorine. If your 10 ml pool sample turned pink/red when you added the powder, you have chlorine.

    If it turned back to clear on the 4th drop of R-0871, then you have 2ppm FC....it's really that simple and points out the futility in trying to manage a pool properly with reliance on pool store tests.

    Review the procedures of the test to insure you followed the directions and then start saving gas money (and more) by staying away from the pool store.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: TF100 new user - FC reading way different from Pool Stor

    Trust your own measurements
    For peace of mind tell us what steps you tookto get your results be fairly precise how much water how many scoops drops etc.
    24' 52" Above Ground
    BBB
    LOVE TFP
    TF Test kits, Pool School, Pool Calculator

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    BoDarville's Avatar
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    Re: TF100 new user - FC reading way different from Pool Stor

    mrblaine:

    Welcome to TFP

    In all likelihood, you are not doing anything wrong. As you become more familiar with this forum, you will learn to trust your own test results over the pool store's. Pool Store test results are notably inaccurate.

    Which test did you use to measure chlorine - was it the FAS-DPD test (the one that uses the powder) or was it the basic OTO test (the one in the small blue box )?
    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
    A good test kit is an investment, not an expense.

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    GreatCanadian's Avatar
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    Re: TF100 new user - FC reading way different from Pool Stor

    If you did what duraleigh said, then ignore the pool store reading. And be 100% confident that your reading is the right one.
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

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    Mod Squad Bama Rambler's Avatar
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    Re: TF100 new user - FC reading way different from Pool Stor

    Welcome to TFP.

    Most likely the pool store is testing TC. The OTO test is TC. What that means is that you have 1.5 ppm FC and 13.5 ppm CC.

    You need to start the shock process and stay with it until you pass the OCLT and the water is clear.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: TF100 new user - FC reading way different from Pool Stor

    How are the rest of your numbers looking?
    23,000 gallon gunite with waterfall, radiant heat, sta rite system 3 cartridge filter 450 sq. ft., 1 1/2 HP

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