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Thread: Tale of two Pool water tests

  1. Back To Top    #1
    Tonedeaf's Avatar
    Join Date
    Jun 2008
    East of Dallas

    Tale of two Pool water tests

    So I have a day off today, first weekday in ages. Went to try out another pool store in the area to get the water tested. I aso took water to the regular pool store that I have been going to the past 3 weeks for a test to compare.

    Store 1 & Store 2
    pH (1) 7.4 (2) 7.8
    FC (1) 3.0 (2) 5.5
    TA (1) 180 (2) 148
    CH (1) 250 (2) 190
    Salt (1) 3800 (2) 3200
    CYA (1) 30 (2) 0

    Store 2 is the one I have been going to but all of the numbers are off by quite a bit in my opinion. Store 1 was a strip based test and a manual look at the color compared to the chart on the test strip bottle. Store 2 was a computerized test using a strip that was fed into a machine.

    Which test in your opinion is more accurate??
    14100 gallon IG Gunite Pool
    Sapphire Smoke Quartz Plaster
    Pentair SunTouch Controller, Intelliflo 4x160 Pump, 520 Cartridge Filter, Intellichlor SWG System
    Legend Platinum Cleaner with booster pump
    My Pool Build

  2. Back To Top    #2

    Re: Tale of two Pool water tests

    Neither! Both stores are using strips so I would not put much faith in either. A lot depends on how new the strips are, whether they have been exposed to moisture, the brand of the strip (there are WIDE variances here, especially on the CYA test!), and how long the strip sat before it was read (some of the tests continue to change color with time and if read too soon or too late will give inaccurate results.) Get yourself a good test kit and test your own water!!!!

  3. Back To Top    #3

    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Tale of two Pool water tests

    Which test in your opinion is more accurate
    Just to reinforce what waterbear said. the answer is "Neither!"

    Do your own will save gas and your tests will be accurate and your pool will be manageable.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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