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Thread: Is an FC of 10 too high to swim in?

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    Join Date
    May 2010
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    Is an FC of 10 too high to swim in?

    Hi all

    2nd year pool owner (first year on the forum). I have an SWG that I have set very high (65%) since by stabilizer reading had been low. Got the stabilizer to about 60 ppm (per SWG pool recommendation) and dialed the SWG down to 35. We had a bad weather week and in addition to my solar heating system I left my solar pool cover on for cool nights. I checked the FC and it was at 8 ppm. So I dialed back the SWG to 10. Today I got a reading of 10 ppm; I now turned it down. All readings were fine expect pH was high; I already added acid to bring it down.

    My question:
    Is it safe to swim with a FC reading of 10 and a CC reading of 0? Normal should be 3-5 based on pool school. Or do I wait a few days until the FC comes down? Current temp of the pool is 81 degrees.

    I heard that a solar pool cover reduces need for chemicals. I guess I should turn off the SWG or really low if the cover is going to be on for more than a few days?
    24000 gallon Gunnite Pool
    WhisperFlo 1.5 hp Pump
    AquaConfort SWG System
    Solar Heating System

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    dmanb2b's Avatar
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    Re: Is an FC of 10 too high to swim in?

    If your CYA is 60, then anything below shock level of FC 24 would be fine to swim in. I had the same weather...strange weekend/monday, solar cover on and my FC crept up to 11ppm as well. We swam today though and my hair is still on my head
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Re: Is an FC of 10 too high to swim in?

    I guess it depends on your CYA

    My CYA is 75 and I we swam all weekend long with FC ranging from 11 -15ppm and the water was great. I opened my eyes underwater for the first time to truly expreience what a pH of 7.5 really means. It was a great weekend.
    TFP SUPPORTER through TFTestKits.com - My Pool: South Florida, 11K gallons, In ground, concrete / Diamond Brite, Free Form with attached spa (no heater- go figure) Built around 1998, original surface, Jacuzzi Magnum Force 1.5HP pump, Jacuzzi Cartridge Filter, Rainbow 320 Tablet Feeder, Hayward Navigator Pro, Taylor K-2006 w/ TFTestKits replacemeng Reagents.

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    Butterfly's Avatar
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    Re: Is an FC of 10 too high to swim in?

    My question:
    Is it safe to swim with a FC reading of 10 and a CC reading of 0? Normal should be 3-5 based on pool school. Or do I wait a few days until the FC comes down? Current temp of the pool is 81 degrees.
    Most of us agree that it is safe to swim between minimum FC and shock level based on your CYA. So as dman said, you are good to go.

    I heard that a solar pool cover reduces need for chemicals. I guess I should turn off the SWG or really low if the cover is going to be on for more than a few days? Yep.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
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    Join Date
    May 2010
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    Re: Is an FC of 10 too high to swim in?

    Thanks for the info. I wasn't 100% sure about swimming in high chlorine level even though I thought it would be fine.

    I have to say; this forum is just incredible. I did a "pool school" with the pool builder last year and those guys didn't even tell me 10% from what I learned in this forum in the last few weeks.
    24000 gallon Gunnite Pool
    WhisperFlo 1.5 hp Pump
    AquaConfort SWG System
    Solar Heating System

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    poolgirl22's Avatar
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    Re: Is an FC of 10 too high to swim in?

    Quote Originally Posted by PatG25
    Thanks for the info. I wasn't 100% sure about swimming in high chlorine level even though I thought it would be fine.

    I have to say; this forum is just incredible. I did a "pool school" with the pool builder last year and those guys didn't even tell me 10% from what I learned in this forum in the last few weeks.

    FOR FREE.... Just wanted to add that...
    Backyard pool-less, but used to be.....
    16,100 gallon, 18x38 3.5 ft deep oval AG, Vinyl, Sand, 1hp pump
    http://www.poolservicestech.com Liquidator
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