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Thread: Help in Reading the Comparator

  1. Back To Top    #1

    Join Date
    Jul 2008
    Sinking Spring, PA

    Help in Reading the Comparator

    I ordered the TF100 (it should arrive on Wednesday!)

    In the mean time I have been using a basic Taylor test kit that my PB gave me. My problem is that I have a very difficult time reading the FC and PH levels. No problem with adding the regents, my problem is deciding what color matches. It looks different depending where I look. I have tried reading it outside and inside, but still I have trouble.

    Does anyone else have this problem? Any tips or tricks to help me?

    Will the TF100 be any easier for me?

    4th Year Pool owner in Sinking Spring PA
    46'x23' Free Form Concrete (34,000 gallons), Aqua Blue Pebble Sheen Finish, Pentair IntelliChlor SWG
    Pentair Intelliflo Variable Speed Pump, Pentair D.E. FNS Filter, Pentair MasterTemp heater.

  2. Back To Top    #2

    Join Date
    Mar 2008
    Lake Forest, CA

    Re: Help in Reading the Comparator

    For my pH testing (the only thing I use a color comparator for), I always do it during the daytime outside, holding it so the background is white (angled down a bit towards our pool deck, or on the side of the house where we have a white entry door).

    If you are outdoors in natural light, can you hold it somewhere where you have a white background? If not, anything close? I avoid doing it indoors if at all possible.

    At least when you get your TF100 kit, you can titrate for your FC level and only use a color block for the pH.

    12000 gal IG pool/spa combo,60 sq ft Jandy DEL filter,2 hp Jandy Stealth pump,Jandy LX400 400K BTU gas heater,Pentair Rainbow 300 off-line feeder (never gets used),Jandy Aqualink RS4 with PDA remote,3 Jandy 12" sheer descent waterfall features, Dolphin Oasis Z5 robotic cleaner

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Help in Reading the Comparator

    The PH test is essentially identical in the TF100, but the chlorine test is much simpler to use.

    For both tests, you want to hold the test block up to either the northern sky or a sunlit white surface if you can. Distinguishing colors is much simpler in good lighting. For the OTO chlorine test, drops turn the sample various shades of yellow, most people have trouble distinguishing chlorine levels above 2 from each other, and most people can figure it out for levels between 0 and 2.
    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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