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Thread: water samples at pool store

  1. Back To Top    #1

    Join Date
    Jun 2008
    Bham, AL

    water samples at pool store

    Quick question from a newbie to this site:
    How long can a water sample sit before it is tested at the pool store and still be fairly (somewhat?) accurate? (Ordered my test kit yesterday and it's not here yet...)
    Thanks. I'll post all my problems and numbers later.
    40,000 gal painted plaster pool (30 yrs old)
    Bham, Al area
    pentair pump and sand filter

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: water samples at pool store

    The FC level can change in minutes, though it doesn't always do so. If you take a water sample in a clean, opaque, air tight container with no air in it, the FC level will usually stay fairly stable. But few people are that through. CC is occasionally lost in the same way, but is generally much more stable than FC.

    Ignoring contamination, all of the other levels are good for several hours at least, probably days.
    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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