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Thread: FC

  1. Back To Top    #1

    FC

    In general, how much should FC go down in a day if CYA is at 40
    25k Gallon Gunite Inground Pool
    Pentair FNS PLUS DE filter
    Pentair WhisperFlo WF-24 (seems like single speed)
    Chlorine
    Bel Air, MD 21015

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: FC

    That's like asking how much will my bucket hold?

    When asking a question like that you need to remind people where you are, and things like if your pool gets full sun all day, is it covered during the day, do you have a clear or opaque cover, and anything else pertinent.

    Most people find losing about 2ppm per day normal but your CYA may have to be more or less than 40 to acheive that. I get full sun all day and lose about 2ppm per day in sunny South Alabama but I run my CYA near 60.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: FC

    A rough average would be an FC drop of 60%, but individual results will vary wildly from that.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  4. Back To Top    #4

    Re: FC

    So u basically need to add bleach every day correct?
    25k Gallon Gunite Inground Pool
    Pentair FNS PLUS DE filter
    Pentair WhisperFlo WF-24 (seems like single speed)
    Chlorine
    Bel Air, MD 21015

  5. Back To Top    #5
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: FC

    Yes, adding bleach every day is normal.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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