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Thread: Swimming after shocking

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    cliffstone's Avatar
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    Swimming after shocking

    I had a small amount of algae and shocked last night. Assuming my FC holds this morning will it be safe to swim today? I've heard conflicting answers - a)less than 10ppm is safe or b)as long as overnight FC tests OK it's good to go regardless of FC level. Shocked to 16ppm, CC was 0.5, CYA-50 ph-7.5 TIA
    18x36 IG, 22k Gal, Vinyl, 1HP Hayward SuperPump, 250lb Hayward Sand Filter

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    dmanb2b's Avatar
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    Re: Swimming after shocking

    Anything below shock level (16 FC) should be safe to swim in with CYA at 50.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Mod Squad Bama Rambler's Avatar
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    Re: Swimming after shocking

    We swam at just below shock level for our CYA level, which just happens to be 50ppm like yours.
    Dave J. TFP Moderator
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    Re: Swimming after shocking

    Hey, cliffstone,

    I realize you didn't ask, but if you had visible algae and elevated the FC just last night, there is virtually no way your FC will test the same this AM as it did last night.

    Shocking is a process.....not a one-time dosage. Take a look at "How to Shock your Pool" and "How to do the overnight FC loss Test" both in Pool School. It'll help you clear up your algae permanently.

    Personally, I would continue to swim in a pool that looked decent but may still have a little algae lurking as long as I had some chlorine in the pool so enjoy your weekend but I think you'll need to replenish the FC.
    Dave S.
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    cliffstone's Avatar
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    Re: Swimming after shocking

    Thanks everyone. My numbers are FC-12 and CC<0.5 this morning. We're gonna swim this weekend and have fun. I hope everyone has a safe and happy Memorial Day weekend and please remember what this holiday is all about.
    18x36 IG, 22k Gal, Vinyl, 1HP Hayward SuperPump, 250lb Hayward Sand Filter

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    pitguy3's Avatar
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    Re: Swimming after shocking

    I was gonna ask the same question cliffstone... Thanks for asking it for me!!

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