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Thread: Measuring bleach strength?

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    Isaac-1's Avatar
    Join Date
    May 2010
    SW Louisiana

    Measuring bleach strength?

    Is there any reasonable home test to measure the strength of bleach? I ask because my latest batch of 5.25% bleach seems to be particularly strong based on actual vs projected FC rise ( I would guess on the order of 10% bleach effect).

    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Measuring bleach strength?

    There are three ways to do it. One is to use extreme amounts of dilution, another is to add enough bleach to the pool to raise the FC level significantly and see if the increase is what you expect, and the final way is to get a specialized test kit like the Taylor K-1579. See this topic for details on using dilution.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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