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Thread: How much FC is "too much" ?

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    Join Date
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    How much FC is "too much" ?

    This year I have the mindset that I am going to maintain as high a level of FC's so as to not cause harm to my swimmer guests. Right now my FC is 5, and my kids swam for severall hours this past memorial day. I can smell "chlorine", near the pool, but my kids had no problems at all. No red eye, or irritation. Is FC of 5 too high? OK ? how about FC of 6? Thanks!

    Rich
    "To be old and wise, you must have been young and stupid"

    18X33 Aquasphere buttress AG pool
    Pentair SD60 sand filter/1 hp pump/ Pool Frog
    Polaris 65 super turtle

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    reebok's Avatar
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    Re: How much FC is "too much" ?

    it depends on your cya. see chart:
    pool-school/chlorine_cya_chart_shock
    and if it's a bad smell it may be cc's which are bad. do you have a test kit? can you test for cc's? your other numbers would be helpful also.
    16x32 21,000 gallon in-ground exposed aggregate, 1.5hp pump, 120 sqft catridge filter, birdcage, solar panels, aquavac tigershark qc robot.

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    frustratedpoolmom's Avatar
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    Re: How much FC is "too much" ?

    Chlorine smell is almost always from elevated CC's. Ideally you want your CC to read 0, anything over .5 you should shock the pool. As stated above, your appropriate FC level is dictated by your CYA level.

    If you don't have a good test kit, you should order one of the recommended kits. Read the article in Pool School that compares them.
    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
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    Re: How much FC is "too much" ?

    Quote Originally Posted by frustratedpoolmom
    Chlorine smell is almost always from elevated CC's. Ideally you want your CC to read 0, anything over .5 you should shock the pool. As stated above, your appropriate FC level is dictated by your CYA level.

    If you don't have a good test kit, you should order one of the recommended kits. Read the article in Pool School that compares them.
    I have a TF100 kit , and my CYA is 50
    "To be old and wise, you must have been young and stupid"

    18X33 Aquasphere buttress AG pool
    Pentair SD60 sand filter/1 hp pump/ Pool Frog
    Polaris 65 super turtle

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    JasonLion's Avatar
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    Re: How much FC is "too much" ?

    With CYA at 50, FC between 4 and 8 is completely normal and I am willing to swim at FC levels up to 16. Many public pools run at much higher effective chlorine levels, because they don't use any CYA.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: How much FC is "too much" ?

    OK great , Thank you !
    "To be old and wise, you must have been young and stupid"

    18X33 Aquasphere buttress AG pool
    Pentair SD60 sand filter/1 hp pump/ Pool Frog
    Polaris 65 super turtle

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