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Thread: pH testing frustration

  1. Back To Top    #1

    Join Date
    Jul 2013
    Walton, KY

    pH testing frustration

    I'm hoping for some clarification on pH testing using the Taylor K-1000 kit that came with my TF-100 kit. I know this question is going to be hard to explain but here is the question: am I trying to match the color or the intensity of the color? It looks like the top 3 blocks on the tester are nearly the same color but with different intensities. (Like three different samples of the same berry Kool-Aid but at different dilution levels). The 7.5 does appear to have a hint of orange and the other two are definitely more orange. It seems to me that the color of my test water never seems to fall exactly in the spectrum from pink to orange with the same intensities on the tester and the spectrum seems to end at the 7.8 block with the 8.2 block being a darker version of 7.8 and not necessarily less orange.

    I acknowledge that I may be expecting more precision than such a simple test kit can provide, but I'm an engineer by nature (and degree) and a career pilot. Attention to detail and precision are in my DNA.
    22,000 gal in-ground vinyl
    Hayward Pro Series S-244S Sand Filter
    1 HP Self Priming Pump w/chlorine feeder

  2. Back To Top    #2

    Join Date
    Mar 2011
    Houston, Texas

    Re: pH testing frustration

    I share your frustration. I've always had this problem with the pH test. My test always shows a shade of red, but I rarely get the purplish color of the 8.2 sample. Best I can tell is that my pH stays somewhere between 7.8 and 8.1 until I add about a quart of MA and it falls to around 7.5.
    9,200 gal. Gunite Luna Quartz French Grey pool with spill over spa, two fountains on tanning ledge (rarely used)
    Pentair Whisperflo 2HP, Pentair CCP Cartridge 420 Sq. Ft., Polaris 280 with booster pump
    Pentair EasyTouch 4, RayPak LoNox 266k Natural Gas heater, Aqua Rite SWCG T Cell 9, Borates, TF-100 test kit

  3. Back To Top    #3

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: pH testing frustration

    yellow 6.8 and lower

    yellow orange 7.0

    orange 7.2

    orange red 7.4-7.5

    red 7.6-7.8

    red violet 8.0

    violet 8.2 and higher

    The test gets easier with practice.

    The next step up is electronic testing. Those that are good enough to depend on start around $200 and require regular calibration.

    This OTO test (that you have) is the only pH test that makes economic sense for the average pool owner.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Midland TX

    Re: pH testing frustration

    Welcome to the forum. I hear ya for sure on this one. I try and try to get used to it but I have a hard time too. I usually go to my meter, but I am lucky to have that luxury. You just have to use the "best guess" method, but honestly it really gets easier with practice. Most importantly, it is suffcient to do the job. Not what you wanted to hear I know, but that's the straight scoop.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  5. Back To Top    #5

    Join Date
    Jul 2012
    Herndon, VA

    Re: pH testing frustration

    post a pic
    8,000 gallon, in ground, fiberglass pool with a cartridge filter.

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