Hydrogen peroxide

Discussion in 'Reef Chemistry by Randy Holmes-Farley' started by Cory, Jan 3, 2018.

  1. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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    Ive read that lagoons can accumlate as much as 250 nM of h202. How much is that in ppm?

    I want to dose my tank daily this concentration. How many ml of 3% h202 would i need approximately? Tank is 200 gallons.

    I want to see if it has an effect on hair algae.
     
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  2. tsav87

    tsav87 Well-Known Member R2R Supporter Build Thread Contributor

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    How old is your tank?
     
  3. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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    About 6 months
     
  4. tsav87

    tsav87 Well-Known Member R2R Supporter Build Thread Contributor

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    With your tank being 200g, do you have any tangs or rabbit fish in your system? They would normally mow the HA down in a hurry.
     
  5. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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    Yes i do i have two large tangs. They dont touch it.
     
  6. tsav87

    tsav87 Well-Known Member R2R Supporter Build Thread Contributor

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    Yeh some get spoiled to prepared foods I'm afraid :rolleyes:

    I have tried hydrogen peroxide with a 1ml/10 gallons but it had no effect on bryopsis. Some have had success with Vibrant, but I did not.

    Are you sure you are dealing with run of the mill hair algae?
     
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  7. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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    Yep its hair algae for sure. I might try 1ml per 10 gallons. It dies easy when i spray it directlywith h202.
     
  8. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    250 nM of hydrogen peroxide is 8,500 nanograms per liter, or about 0.009 ppm.

    That means about 0.28 mg of 3% hydrogen peroxide per liter of tank water. Not much. lol
     
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  9. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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    Lol is that basically like a drop of a salifert syringe? Or .056 grams?

    The thought is does dosing a continous amount in the quantity kill algae.
     
    Last edited: Jan 3, 2018
  10. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    I wouldn’t be sure you do not already have that much or more, but I doubt it would hurt anything to dose this amount.
     
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  11. JimWelsh

    JimWelsh Valuable Member R2R Supporter

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    Reference?
     
  12. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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  13. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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    Was that a typo? Should it say .28ml not mg?
     
  14. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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    While the amount is small its interesting to me that the ocean maintains a consistantly measurable amount of h202 durring the day. Open oceans maintain 8-100 nM of it in surface waters. And coastal areas maintain 100-250 nM more than the open ocean. The daily accumlation and nightly reduction of it must be doing something. Perhaps it kills bacteria. Ive found that oxidized algae is more palatable to snails, as ive watched them eat white algae but not touch green hair. Perhaps oxidized bacteria are also more tasteful to coral?

    So just as we manipulate alkalinity to higher concentrations with the hopes of increasing growth of sps, is it reasonable to also increase h202 to slightly higher concentrations than nsw contains and maintain it daily as we would with alkalinity?
     
  15. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    Half time of hydrogen peroxide in seawater is 12-120 h, according to Millero, who also says it ranges from 10 -200 nM and generally correlates with organic matter (more organics yields more hydrogen peroxide). Some is made by UV reacting with organics, and some by metals reacting with UV.
     
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