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Thread: cloudy (chlorine only) test cylinder

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    kkendall's Avatar
    Join Date
    Aug 2012

    cloudy (chlorine only) test cylinder

    Does the chlorine only cylinder in the TF-100 kit get cloudy because undissolved powder scratching the surface or it it being chemically etched? (Note - I do use the SpeedStir)
    * 18.5 K Gallon, 8ft deep, IG, Pebble Radiance * Pentair VS 3050 Pump w/420 Cartridge Filter
    * Blue Square Q-360 In-floor Cleaning System * UltraPure UPP25 Ozone Generator
    * Pool startup: 09-04-2012 * TF-100 Test Kit

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: cloudy (chlorine only) test cylinder

    Most commonly, it's because the R-0870 powder leaves a dark stain. It's harmless enough but a 2:1 solution of muriatic acid and water will remove it quickly. Soaked in vinegar might remove it overnight (or sooner) but I have never tried that.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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