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Thread: Oxidised Fe any good?

  1. #1
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    Oxidised Fe any good?

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    I normally drop my iron directly into the tank but today, I decided to drop it into my bucket of top up water within which a Ketapang leaf had been left to leach tannins.

    I was surprised to see the iron (Seachem Fe) turn black upon contact with the water. Out of curiosity, I tried Dr Mallick's LGA, and saw the same result.

    My question is thus, can the plants use oxidised iron, or are we just dosing iron in vain if we have tannic acid in the water?
    Warm regards,

    Lawrence Lee

    brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable--if anything is excellent or praiseworthy--think about such things.
    Philippians 4:8

  2. #2
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    Plants can't use oxidised iron. The tannic acid thing shouldn't affect whether your plants absorb iron.

    ( I'm no pro though )

  3. #3
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    Re:

    [quote:c02e470742="|squee|"]Plants can't use oxidised iron. The tannic acid thing shouldn't affect whether your plants absorb iron. [/quote:c02e470742]

    I think the tannic acid oxidises the iron.
    Warm regards,

    Lawrence Lee

    brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable--if anything is excellent or praiseworthy--think about such things.
    Philippians 4:8

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