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Thread: 27% hydrogen peroxide

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    27% hydrogen peroxide

    From what I've read 3% hp will neutralize a similar quantity of 6% bleach in chlorine residual. Is this linear, will the 27% hp I found neutralize 9X as much? (practical experience says no, I tried it this morning on an over chlorinated 1,900 gal. spa, with no results )

    {if you need more specifics, the 1900 gal. hot tub was at 9 ppm fc with 1 ppm cc @ 9:00 AM, I dosed it with 1 1/2 tsp 27% to bring the cl down 2 ppm. At 1:00 - the fc was still 9. Did I miscalculate or is the CL 220 (Hayward) feeder just adding too much?}
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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    JasonLion's Avatar
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    Re: 27% hydrogen peroxide

    Yes, hydrogen peroxide neutralizing chlorine is supposed to be linear. 2.6 oz of 27% to neutralize 1 ppm of FC in 10,000 gallons. So it should have taken out some of your FC level.
    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

  3. Back To Top    #3

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    Re: 27% hydrogen peroxide

    Thanks Jason

    I turned down the chlorinator, but folks hopped into the tub before I could redose it I'll try again tomorrow
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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    Re: 27% hydrogen peroxide

    Ted

    Here are my calculations based on the information provided by Jason.

    1.5 teaspoons is approx 0.25 oz (1/4 oz)
    If it takes 2.6 oz to neutralize 1ppm in 10,000 gallons then it will take only 0.494 oz (1/2 oz) to neutralize 1 ppm in 1900 gallons.
    Basically 3 teaspoons for each 1 ppm.
    To lower the chlorine by 2 ppm would require 0.988 oz (1 oz) or roughly 6 teaspoons or 2 TABLEspoons.
    Adding only 1.5 teaspoons (0.25oz) would only change the FC by 0.5 ppm (1/2 ppm) which could have easily been replaced by the tablet feeder in a relatively short time period or 0.5 ppm could be lost in testing error of even the most careful tester.

    With any luck, the bather load from tonight will take care of 2 ppm chlorine.
    At least you will know how to solve the problem next time.

    PSG
    poolschoolgrad

    20x40 free-form IG vinyl, 1hp Hayward superpump, Hayward pro grid DE filter, Raypak heatpump, Goldline Aquarite SWCG, Polaris 280 with booster, and tested using a Taylor K2006.

  5. Back To Top    #5

    Re: 27% hydrogen peroxide

    It would probably help to reduce the number of tabs in the feeder. You can't rely completely on the feeder control valve because the tabs are sitting in water and continue to dissolve even if the valve is completely closed. When the valve is reopened, the concentrated chlorine comes out and overchlorinates.

  6. Back To Top    #6

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    Re: 27% hydrogen peroxide

    Thank you all!

    I'm all to well aware of the # of pucks problem - I keep ~ 1 1/2 in and have the dial set to ~ the lowest I can

    However, as anyone with experience with these units knows that a little debris will clog the feed and, on small pools finding the "sweet spot" is difficult, at least.
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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