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  1. #1
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    what is elemental iodine?

    Why am I trying to remove elemental iodine?
    I did a SEACHEM test for iodine/iodide. Part of the instructions say
    "
    [If a blue color develops now, elemental iodine is indicated. This should be viewed as a hazardous
    status. Use a dechlorinator such as
    Prime™ to remove elemental iodine.]"

    What is elemental iodine, how is it formed and why am I trying to get rid of it... I thought we needed iodine in our water.

  2. #2
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    Liv, what do you think hehe
    300g reef system

  3. #3
    liv
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    Former Moderator liv's Avatar
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    HI,
    Was this iodine added by yourself ?
    iodine is needed by many corals to grow properly and healthy.
    is your test kit for saltwater ?
    iodine is also added in some municipalities, so if thats the case with yours,you could either run an rodi system ( like most of us do ) or get a dechlorinator that also removes iodine.

    but unless your corals are unhappy, i dont think your iodine can't be that high unless it was added as a supplement to dangerous levels.

    hope this helps.

    moving.. so temporarily out of SW :b8:
    planning next tank, possibly 60x30x20 on 2x plasma.
    updated: 2011/05/30

  4. #4
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    I was thinking that "elemental" iodine was a toxic form of iodine based on the way they presented it in the test information. Yes I have dosed within the month with Lugols solution but I do that very rarely and in small amounts. The reason I became curious about my iodine levels was because I am having troubles with my leather coral and also because my cleaner shrimp just mottled. I am aware that both like a bit of iodine. Having never tested for it before and because I cannot find answers to my problem leather I added a few drops thinking that it would make a difference. My LFS has not been able to diagnose the cause. I saw that test for iodine and figured it should be tested.

    Thank you Liv for letting me know that "elemental iodine" is the same as IODINE and that it is acceptable in a salt tank.

  5. #5
    Former Moderator a4twenty's Avatar
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    Quote Originally Posted by newmarket View Post
    I was thinking that "elemental" iodine was a toxic form of iodine based on the way they presented it in the test information. Yes I have dosed within the month with Lugols solution but I do that very rarely and in small amounts.
    you're correct.............

    all iodine ( I, I2 ) is toxic in large enough quantities but free elemental iodine ( I2 ) on its own is more toxic even in very small quantities. if you tested positive for I2 the first thing i would do is try another test kit for verification.

    lugols is iodine and potassium iodide ( I2KI ) and is safe to use in small quantities but you should always be testing to make sure you don't overdose.

    personally i use lugols for dips and let water changes take care of the tanks iodine level.


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  6. #6
    liv
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    ya.. I personally take my iodine from water changes.
    I did add some from time to time but was testing it with a salifert kit i think it was. i had a softy that really enjoyed the supplement.

    moving.. so temporarily out of SW :b8:
    planning next tank, possibly 60x30x20 on 2x plasma.
    updated: 2011/05/30

  7. #7
    Member Chix's Avatar
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    Elemental iodine is indeed toxic and if the test results came up positive, you should do something about it. You can conduct another test to be on the safe side first, and if the problem persists, you should definitely take action.

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