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Thread: What is a safe amount of chlorine to swim in after shocking?

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    What is a safe amount of chlorine to swim in after shocking?

    I'm getting ready to shock my pool due to lingering small algae clusters I keep getting every other day. I have several small children that swim in our pool and I wanted to know what is the highest amount of chlorine (in PPM) that is safe for kids to swim in?

    Thanks!
    Pool Size: 8600 gallons - rectangle 12'x24'
    Pool Type: Inground with vinyl liner
    Filter: Hayward Pro-Series S244T - 300# Sand Filter
    Pump: Astral Pools IGP2010 - 1HP

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    Join Date
    Apr 2009
    Location
    Raleigh, NC
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    55

    Re: What is a safe amount of chlorine to swim in after shocking?

    3 - 5PPM is the standard. But it depends on how high your CYA is. You should check out the pool school here. There is a chart for FC levels based on CYA levels. I run about 8 - 12PPM as a standard in my pool. But that is with a CYA level off 100PPM.
    93mastercraft - Aqua Leader Reflexion 21' round 54" high above ground pool. This is not a $399.00 Pool! Wedding cake steps, Haywood 1.5 pump/sand filter. If I'd thought taking care of a pool was this easy, I'd owned one a long time ago!

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    Re: What is a safe amount of chlorine to swim in after shocking?

    I'm running about 40PPM for my CYA. Which is a minimum of 3 PPM, target of 5 PPM and a shock value of 16 PPM. After shocking it, does it need to get back down to 5 PPM before letting the kids back in? Or can it be higher?
    Pool Size: 8600 gallons - rectangle 12'x24'
    Pool Type: Inground with vinyl liner
    Filter: Hayward Pro-Series S244T - 300# Sand Filter
    Pump: Astral Pools IGP2010 - 1HP

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    frustratedpoolmom's Avatar
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    May 2007
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    SWSuburban Chicago, IL
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    Re: What is a safe amount of chlorine to swim in after shocking?

    It's perfectly safe to swim up to shock level
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Join Date
    Apr 2009
    Location
    Raleigh, NC
    Posts
    55

    Re: What is a safe amount of chlorine to swim in after shocking?

    Quote Originally Posted by frustratedpoolmom
    It's perfectly safe to swim up to shock level
    I agree... as long as your pool is clean and clear, the chlorine at shock level will not hurt you or the kids! The Free chlorine will dissipate away pretty quickly when the sun is baring down and you are swimming in the pool.
    93mastercraft - Aqua Leader Reflexion 21' round 54" high above ground pool. This is not a $399.00 Pool! Wedding cake steps, Haywood 1.5 pump/sand filter. If I'd thought taking care of a pool was this easy, I'd owned one a long time ago!

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    Re: What is a safe amount of chlorine to swim in after shocking?

    Thanks for the information! My pool has been in the shock process for three days and I'm slowly beating the algae but the kids are starting to get anxious. Oh well, everything should be good in a couple of more days.
    Pool Size: 8600 gallons - rectangle 12'x24'
    Pool Type: Inground with vinyl liner
    Filter: Hayward Pro-Series S244T - 300# Sand Filter
    Pump: Astral Pools IGP2010 - 1HP

  7. Back To Top    #7

    Re: What is a safe amount of chlorine to swim in after shocking?

    What do you normally keep your chlorine at?

    If you are keeping it at recomended levels for your CYA, and you are getting pockets of algae every other day, something is wrong.

    And, remember, you are done shocking only when your overnight chlorine loss is less than 1ppm.

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    Re: What is a safe amount of chlorine to swim in after shocking?

    Quote Originally Posted by waskydiver
    What do you normally keep your chlorine at?

    If you are keeping it at recomended levels for your CYA, and you are getting pockets of algae every other day, something is wrong.

    And, remember, you are done shocking only when your overnight chlorine loss is less than 1ppm.
    Thanks for the post!

    The chlorine is normally at 3-5PPM (3 before I put chlorine in, 5 after) but about two weeks ago I was out of town for a few days and someone was suppose to add chlorine but didn't. When I returned I had 0 chlorine. I didn't shock then and the algae slowly creeped up on me since I didn't shock. So last weekend it got to the point where I would have algae on the pool floor. It's nothing bad but enough to become a bigger problem. Also, the chlorine is dropping more than 1PPM nightly (it's closer to 3PPM).
    Pool Size: 8600 gallons - rectangle 12'x24'
    Pool Type: Inground with vinyl liner
    Filter: Hayward Pro-Series S244T - 300# Sand Filter
    Pump: Astral Pools IGP2010 - 1HP

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    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: What is a safe amount of chlorine to swim in after shocking?

    Continue shocking your pool at an FC of 16, running the filter 24/7, and brushing. Make sure it is at shock level before you go to bed at night and check it again in the morning before any sun hits the water. If your FC loss is > 1 ppm overnight, continue shocking at the full 16 ppm, full-time, until the FC holds over night.

  10. Back To Top    #10

    Re: What is a safe amount of chlorine to swim in after shocking?

    I just wanted to say that I got our pool back to normal and everyone is happy again!
    Pool Size: 8600 gallons - rectangle 12'x24'
    Pool Type: Inground with vinyl liner
    Filter: Hayward Pro-Series S244T - 300# Sand Filter
    Pump: Astral Pools IGP2010 - 1HP

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