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Thread: SWG run time advice needed

  1. Back To Top    #1

    Join Date
    Jun 2011
    SE Kansas

    SWG run time advice needed

    What FC value should I expect to see in the evening?

    I finally started using the SWG today after manually adjusting the FC
    all week with clorox.

    This morning I added 39oz 6% clorox and ran the SWG during
    the afternoon. I tested the water every couple of hours.

    Starting values (11AM) AFTER adding clorox:
    FC 4.0
    CC 0.5
    TC 4.5
    CYA 70

    Ending values (7:30PM) after SWG ran for 4 hours:
    FC 4.5
    CC 0.0
    TC 4.5
    CYA 70

    The values held steady with all day direct sunlight and temps
    in high 90's...

    Do these values reflect a working SWG then? It appears to me
    they do...

    The SWG is still running...the manual says with the temperature
    and size of the pool, to maintain FC, I'd have to run the SWG
    for 9 hours a should I keep it running another 5 hours

    Will FC creep up if I do?

    Thank you for your help...
    12500 gallons
    24' x 52" metal frame
    Intex Krystal Clear 2650 GPH Sand Filter Pump
    Saltwater System
    Above Ground

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

    Re: SWG run time advice needed

    Every pool is different, so the only way you can find the correct run time is by experimenting. With CYA at 70, you want the early evening FC level to be 3 or higher, preferably a little above 3 to give you some safety margin.

    Yes, it does look like your SWG is working. Yes, if you leave it on tonight the FC level should come up.
    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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