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Thread: General Slam FC question

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    General Slam FC question

    If you slam your SWG pool and are targeting a FC level of 4 but shock level of 24 with CYA=60, how does your FC get back down from 24 to 4? Does it stay high for a while and you turn off your SWG?

    Curious, as to how your pool returns to normal level.
    HoltPool
    21K gal SWG gunite pool/spa/waterfall, Goldline ProLogic controls, 2 2.0 HP Hayward Northstar pumps, hayward heater, 4 cartridge, Polaris 9300 sport robot, TFP-100 test kit owner

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

    Re: General Slam FC question

    Sunlight will burn off the excess chlorine in a couple of days, faster if your turn off the SWG, but it will come back to normal regardless.
    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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    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
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    18,768

    Re: General Slam FC question

    Sunlight will breakdown the FC. It's a percentage, not a fixed ppm per day, so it drops off really fast the first day, a little slower the next. Yes, turn off the SWG. It should actually be off the last night for sure when you do the overnight loss test. If you pass, and you're done, just leave it off!

    It's safe to swim up to SLAM level, by the way.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: General Slam FC question

    Thx. Just getting into this and so many questions, so little time!
    HoltPool
    21K gal SWG gunite pool/spa/waterfall, Goldline ProLogic controls, 2 2.0 HP Hayward Northstar pumps, hayward heater, 4 cartridge, Polaris 9300 sport robot, TFP-100 test kit owner

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