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Thread: What is the purpose of the Basic OTO kit?

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    Join Date
    Jul 2015
    Cartersville, GA

    What is the purpose of the Basic OTO kit?

    I get the pH test but I tend to use the FAS / DPD test for chlorine. My CYA is 50 so I am keeping the chlorine at ~6 which is beyond the OTO chlorine test.

    Is there even a reason to use the OTO test for chlorine?
    27' Round Vinyl Lined Above Ground, Hayward Power-LX 1.5hp pump & Dream Line Sand Filter S190TSCP
    TF100 Test Kit / Tiger Shark QC

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    yostmatt's Avatar
    Join Date
    Jun 2014
    Hollidaysburg, PA

    Re: What is the purpose of the Basic OTO kit?

    i use it for quick testing, as long as its slightly darker than the 5ppm yellow. For exact results, i use the FAS/DPD.
    ~Matt~ Radiant Metric 24'x52" 14k- built into a slope. CircuPool Si-30 SWCG. Jandy 200 SqFt cartridge filter. Pentair Optiflow 2-speed 1HP pump. Wanda the Whale. TF-100 Test Kit. Hard Plumbed.
    My Build w/ lots of pics

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    Join Date
    Jul 2014
    Hope Mills, NC

    Re: What is the purpose of the Basic OTO kit?

    16 x 32 17500 gallons
    Vinyl in-ground
    Hayward 250# Sand Filter
    1 HP Pump
    Hayward SWG

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: What is the purpose of the Basic OTO kit?

    It's useful as a sanity check if the FAS-DPD test shows nothing when there should be something. Or more than there should be, and you question your counting ability.

    Minimum for 50 CYA is 4, so you could use it on a daily basis. As long as you're darker than 4, you can just dump in the usual amount of bleach and feel safe. Once or twice a week break out the powder and drops and check yourself.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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