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Thread: Chlorine level discrepancy.

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    Chlorine level discrepancy.

    Needed pool supplies so had my water tested at pool store. Big discrepancy in chlorine levels. Store says fc is .68 & TC is 3.58. My test using Taylor k-2006 is fc is 9.5 ( shocked a few days ago) and cc is 0. Pool store says put 5# of shock. Water is clean & sparkling with no odor. Which test do I trust. I am thinking mine. Thanks for your help.
    13.5K IG plaster SWG sand filter

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    Smykowski's Avatar
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    Re: Chlorine level discrepancy.

    Yes, trust yours. Since you have your own good test kit, you're probably better off never taking water to a pool store to be tested again.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
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    pwrstrk's Avatar
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    Re: Chlorine level discrepancy.

    + 1 ^^^. Always trust your own testing over the pool store.
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: Chlorine level discrepancy.

    Thank you
    13.5K IG plaster SWG sand filter

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    Isaac-1's Avatar
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    Re: Chlorine level discrepancy.

    What they said, but out of curiosity do you know what type of testing the pool store does? drop based, strips, computerized colormetric system, etc? With numbers like their's going 2 places past the decimal I would assume it is some computerized colormetric scanner that reads to high precision, but can still have low accuracy.

    Ike
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Re: Chlorine level discrepancy.

    Computerized colorimetric
    13.5K IG plaster SWG sand filter

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    Smykowski's Avatar
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    Re: Chlorine level discrepancy.

    Is the computer reading the colors from strips?
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: Chlorine level discrepancy.

    No. They put my water in little bottles and stick the bottle in a little machine.
    13.5K IG plaster SWG sand filter

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    Patrick_B's Avatar
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    Re: Chlorine level discrepancy.

    Trust your own results. There is no telling how far off they are. Any time you mix test results there will be confusion. We have thousands of success stories from those using only good results from reliable test kits.
    TFP Moderator
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