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Thread: Where to look?

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    slawton's Avatar
    Join Date
    Jun 2009
    Muskegon, Michigan

    Where to look?

    What is the best way to look at your chemicals when testing (I use theTF-100 test kit)? Do you hold them toward the sky, put a white piece of paper behind them, look at them in the garage, outside by the pool....?

    The colors seem to be slightly different dependent upon what the test is being held up to. Just wondering if there is a standard procedure that is recommended.

    Pool Size/Type: 12' x 24' x 52" Intex AG Rectangular Pool
    8,400 gallons
    Filter Type: SWG combined with a 2,000 GPH pump

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Where to look?

    Color matching, such as the PH test, should be done indirect sunlight either against the northern sky or a white background. If doing the test indoors you really want to use a sunlight simulator. Indoors, you can kind of get away with a brightly lit white sheet of paper, but the results won't be as accurate.
    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

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    DaveNJ's Avatar
    Join Date
    May 2007
    Toms River, NJ

    Re: Where to look?

    I use a white background, my house. Keep a white piece of paper 8 1/2x11 in the test kit.
    IG 18x36 oval vinyl, Spill over spa, Northstar 2hp-2spd, 2.5" piping, S310T 500lb Sand filter, 400k gas heater, AutoPilot SWCG

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    Casey's Avatar
    Join Date
    Apr 2007
    SW PA

    Re: Where to look?

    I use the north eastern sky mainly for my pool pH and when I check my neighbor's pool pH, I use the other neighbor's white house.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

  5. Back To Top    #5
    AnnaK's Avatar
    Join Date
    Jul 2007
    Eastern Pennsylvania

    Re: Where to look?

    I hold the pH tube up against a roll of white paper towels. There are times when the difference between 7.5 and 7.8 seems a little fuzzy but since water within that range is fine I tend not to sweat it.

    Those yellows though for the chlorine? Forget it. They look all the same to me. I'm so happy for the pink-to-clear test.

    12,500 gal AGP, Hayward sand filter, Pentair 2-speed pump, timer.
    Please visit our Pool Issues pages for information about step weights, managing the solar cover, and PoolSkim.

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