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Thread: Safe FCL to swim after shock?

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    Safe FCL to swim after shock?

    What is a safe FCL to swim in after shocking? I shocked around 30 ppm to kill off all the algae and want to know at what FCL level can we start swimming again? My daughter wants to jump back in the pool and we only have a few days of summer left. Thanks.
    Patriot Arcadia 15' round 52". Pentair Clean and Clear 100 sqft Cartridge filter, 1HP Optiflow pump, Goldline Aquatrol SWG. 2 - 4'x20' solar panels roof mounted. All rigid PVC plumbing. Resin Solar reel with 8mil Thermo-tex solar cover. 14 x 12 deck.

    Ovation 15'x24'x52'' AG. Pentair System 3 150 SQ foot cartridge filter, 1 1/2 HP pump.

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    no-mas's Avatar
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    Jun 2008
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    Re: Safe FCL to swim after shock?

    Most on here think it's ok to swim at any level below shock level for your CYA
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    Butterfly's Avatar
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    Re: Safe FCL to swim after shock?

    Yep, many of us think that anything between the minimum level and below shock level, based on your CYA, is perfectly fine.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Re: Safe FCL to swim after shock?

    Hopefully we are below 21 ppm tonight so we can go swimming. Thanks.
    Patriot Arcadia 15' round 52". Pentair Clean and Clear 100 sqft Cartridge filter, 1HP Optiflow pump, Goldline Aquatrol SWG. 2 - 4'x20' solar panels roof mounted. All rigid PVC plumbing. Resin Solar reel with 8mil Thermo-tex solar cover. 14 x 12 deck.

    Ovation 15'x24'x52'' AG. Pentair System 3 150 SQ foot cartridge filter, 1 1/2 HP pump.

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    In the Industry

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    Re: Safe FCL to swim after shock?

    The EPA recommend no higher than 4ppm so take into account your CYA level and keep your childrens lungs safer.

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    Join Date
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    Re: Safe FCL to swim after shock?

    The EPA recommendation is based on their drinking water standard which is 6-8 quarts consumed per day. Several states have 10 ppm FC as a limit for commercial/public pools. I'll write separately in The Deep End later on this week about a recent report on children's asthma and outdoor pools (a follow-on to an earlier study on indoor pools).
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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