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Thread: Dropping below recommended free chlorine level

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    Skitch's Avatar
    Join Date
    May 2015
    Athens, Georgia

    Dropping below recommended free chlorine level

    Using Pool Math, I should maintain between 4 and 8 ppm Free Chlorine. Say my Free Chlorine drops to 3ppm using the Taylor K-2006 10ml test, do I need to slam or will I be alright? I'm not talking about a heavy bather load, just a typical, hot, summer day.
    18,400 gallon 28' round above ground pool sand filter 2013 K-2006 2014 new Hayward pump 2018

    My pool turned green the second year, K-2006 saved me, Trouble Free Pool set me free

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Dropping below recommended free chlorine level

    These are not black and white situations. 4-8 is a suggestion.

    So, Don't let your FC fall below 4 ppm in the first place and if you do anyway, get it back up to 4 or better and you will be fine.

    In short, absolutes don't work as there are so many variables.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    TFP Guide

    Jezza's Avatar
    Join Date
    Jan 2015
    Bunbury, WA, Australia

    Re: Dropping below recommended free chlorine level

    Sometimes it doesn't take much to drop below the minimum FC to develop a problem- particularly when the weather is really hot. Try and keep your FC up at the higher end of your target FC, test daily and always make sure that you have enough chlorine at all times.

    If you're not sure, you can always perform an OCLT and that will tell you whether you will need to SLAM.
    11 000 gallons, IG, Fibreglass, Monarch Sand Filter, Davey Typhoon C100M 1HP pump, Davey Chloromatic Mc16CTO ESR SWG, Davey Pool Wall Climba Robot, Daisy Solar Cover,

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