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Thread: Dr. Mallick Rexolin E13 (chelated iron)

  1. #1
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    Dr. Mallick Rexolin E13 (chelated iron)

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    Hi all,

    Has anyone used this before? How do u guys administer this powdery stuff?

    I have an impression that to mixed in water and introduce to the water column, izzit correct?

    Wats the consequenses of overdosage of iron, how much will be sufficient?

    Thanks
    Mike

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    E13 contains 13% iron.

    Unless you have a weighing machine to weigh out small amounts, I usually recommend to use estimate of 1 tsp to be 5g.

    Do some calculations and you should be able to get the amount you should dose.

    Other information:
    1ppm = 1mg/L
    Recommended Fe level varies, but it is generally 0.1~0.5ppm.

    BC

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    Does Rexolin E13 contain other nutrients than Fe?

    I have switched from Lushgro-Micros to Rexolin APN for some time now and it seem pretty OK.

    Rexolin APN contents: "an ideal mixture of all chelated nutrients containing 5.8% iron, 2.3% manganese, 1.3% zinc, 1.05% boron, 0.25% copper, 0.24% molybdenum and 0.03% cobalt"

    Comes in 150g dry form to be mixed in one litre of water.
    koah fong
    Juggler's tanks

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    KF, quote taken straight from Dr. Mallick's website

    "This unique REXOLIN Solid is a formulated plant food containing micro-nutrients essential for the growth and development of all kinds of garden and aquatic plants. This formulation contains ONLY the micro-nutrients tabulated below. It does not contain any macro-elements like nitrogen, phosphorous, potassium, etc. This scientifically balanced nutritious solid fertilizer is the result of many years of R&D work by Akzo Nobel Corporation of the Netherlands. REXOLIN Solid is a ready-to-use formulation.

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    Interesting. I think must ask Dr Mallick about the contents.
    koah fong
    Juggler's tanks

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    I believe Rexolin E-13 is Rexolin's Dissolvine E-Fe-13. It contains only Fe as nutrients.

    E = EDTA chelate
    Fe = Iron
    13 = 13%

    Check this out:
    http://www.dissolvine.com/productdetail?Product=E-FE-13
    http://www.rexolin.com/dissolvine.htm
    http://www.hhdwa.iinet.net.au/TL-401...ew_Zealand.pdf
    http://www.hhdwa.iinet.net.au/ursefe13.pdf
    http://www.hhdwa.iinet.net.au/ursapn.pdf


    What is refered to in schema's post should be Rexolin APN or the Rexolin range of fertilisers providing micronutrients.

    BC

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    I think the copper should be higher.

    The main issue with the different teraces seems to be one with the chelator, he uses the common ETDA.
    Tropica uses DTPA
    SeaChem uses gluconate

    DTPA seems like one of the better ones, while gluconate may not bind the Fe strongly enough but this trade off means the plants can use it easier.

    But these are traces and differences will be subtle and takes time to gauge.

    While you are comparing them, you need to maintain good CO2/macro nutrients also. Generally I give 4-8 weeks, 3 weeks for most other parameters.
    Measuring the water column Fe content is a poor method.
    Test kits have many problems with measuring Fe that I've discussed many times in other post here and all over the web, APD etc.

    Regards,
    Tom Barr

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    Re:

    [quote:c751013729="bclee"]E13 contains 13% iron.

    Unless you have a weighing machine to weigh out small amounts, I usually recommend to use estimate of 1 tsp to be 5g.

    Do some calculations and you should be able to get the amount you should dose.

    Other information:
    1ppm = 1mg/L
    Recommended Fe level varies, but it is generally 0.1~0.5ppm.

    BC[/quote:c751013729]

    Hi BC,

    Sorry, i'm not so good in chemistry, so need your advise on dosing E13.
    E13 contains 13% iron. So from here, how do i calculate how much is
    required for 500litres to achieve 0.5ppm iron by dosing compound directly to the tank?

    thanks

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    1 teaspoon = 5g, if I assume this to be accurate. 13% Fe So only 650mg.

    1ppm = 1mg/ltr
    so to achieve max 0.5ppm of Fe in your 500ltr tank you need 250mg which is slightly less then 2g, meaning a 3rd++ of a teaspoon. Correct

    Headache liao
    Baby Steel!

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