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Thread: when can swim after a SLAM?

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    Join Date
    May 2015
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    Monroe/NJ
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    76

    when can swim after a SLAM?

    Once I adequately SLAM, when is it safe/recommended to be able to swim again.
    In other words, how long does it typically take a FC level to drop from 28 to swimmable levels? Approximately- I know there are variables like sun exposure (we get a lot on our pool).
    WHat is the maximum safe FC level to swim in?

    Thanks.
    Inground Pool Completed April 2015
    Salt Water Generator- Nature 2 Fusion Soft
    33,500 gallons, Gunite/White Plaster
    Cartridge Filtration
    Heat Pump

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    TFP Guide
    PAGirl's Avatar
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    Jun 2012
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    Re: when can swim after a SLAM?

    Generally, as long as you can see to the bottom and you are below your target SLAM level, it's safe to swim. (Assuming your PH is good, etc.)
    26' X 52" Intex Ultra Frame. Intex Sand Filter
    26' X 52 Intex Ultra Frame Install
    You can lead a horse to (clear) water, but you can't force him to swim in it!

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    Join Date
    May 2015
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    Monroe/NJ
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    76

    Re: when can swim after a SLAM?

    The pool is already clear I am slamming due to excess chlorine consumption based on overnight test. My question is more if you can swim at high chlorine levels? And how long it takes for chlorine to float down after a slam?
    Inground Pool Completed April 2015
    Salt Water Generator- Nature 2 Fusion Soft
    33,500 gallons, Gunite/White Plaster
    Cartridge Filtration
    Heat Pump

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    Join Date
    May 2016
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    MD
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    195

    Re: when can swim after a SLAM?

    From what others have said other times that I have seen, you can swim up to SLAM levels... Chlorine will go away with the sun... over a few days
    IG, 25k gallons, 20x40 ft, Plaster, Pentair sand filter, variable speed pump, have a well, TF-100 test kit, Speed Stir

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    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    Re: when can swim after a SLAM?

    How fast depends on how much FC and how much CYA and how much sunlight. Study on this graph a little and see if you can figure it. The explanation is in Pool Water Chemistry



    If you weren't going over the recommended SLAM level, you can swim immediately. If you overshot, a few hours of full sun should get FC down to there. Run the pump. The burnoff mostly happens near the surface where the UV hits. Down deeper the UV is screened out just by the depth of the water. Since the rate of decay is proportional to the concentration of FC, it will lose a lot more at higher FC and slow down as FC goes down. A couple days should be more than enough to return to normal FC levels.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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