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Thread: Lbs. of Chlorine?

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    Lbs. of Chlorine?

    My SWG Manual says that it will produce 2lbs. of Pure Chlorine in a 24 hour period.
    How many gallons of 10% Chlorine is that?

    Thanks
    35,000 Gal. - 40x20x8 - Plaster - SWG Pentair IC 60 - Barracuda G3 Vacuum - Hayward c1750 Cartridge Filter - Blue Torrent VS 1.5hp pump - Pool is 45 years old.

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    Mod Squad JVTrain's Avatar
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    Re: Lbs. of Chlorine?

    Trade % = grams per liter available chlorine divided by 10

    So 10% Trade = 100 g/L available chlorine

    100 g/L * 3.785 L/gallon * 2.2 lb/1000 g = 0.8327 pounds per gallon of 10% bleach

    2 lbs per day = 2.4 gallons of 10% bleach
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    Richard320's Avatar
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    Re: Lbs. of Chlorine?

    Just so you know... down at the bottom of http://www.troublefreepool.com/calc.html , where it says Effects of Adding Chemicals, 32 oz of Chlorine gas (which is what you're generating) will raise FC in your 30,0000 gallon pool by 8. Coincidently, when you go up and see how much 10% it will take to raise FC by 8, it says 2.4 gallons, exactly what Joel calculated!
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    Mod Squad jblizzle's Avatar
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    Re: Lbs. of Chlorine?

    Remember that 2 pounds (8ppm of FC) is assuming you are running the output at 100% 24 hours a day. If you are only running the pump 8 hours at 100%, then you are down to 8/3 = 2.7ppm of FC. And if you have it set at 50% output, then you are down to 1.35ppm of FC added per day.
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    Re: Lbs. of Chlorine?

    I don't have an SWG but they shouldn't run it at 100% to save on cell life correct?
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    Mod Squad jblizzle's Avatar
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    Re: Lbs. of Chlorine?

    Quote Originally Posted by borjis View Post
    I don't have an SWG but they shouldn't run it at 100% to save on cell life correct?
    It really does not matter. I think what matters is the amount of time it is generating.

    Running at 100% for 4 hours a day or running at 25% for 16 hours a day will produce the same amount of FC and should be similar wear and tear.

    Some may argue that turning on and off more times could cause more wear ... I have no idea if that is true in this case though.

    Of course, since running the pump costs money and nearly everyone generally should only need to circulate the water for a few hours, from a $$$ perspective, running at 100% for the shortest amount of time might be best. Although there could be other reasons to not do this, like running heaters, cleaners, etc.
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    Re: Lbs. of Chlorine?

    Thanks!
    35,000 Gal. - 40x20x8 - Plaster - SWG Pentair IC 60 - Barracuda G3 Vacuum - Hayward c1750 Cartridge Filter - Blue Torrent VS 1.5hp pump - Pool is 45 years old.

    "I'd build a deck over my pool if I didn't have a SWG"

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