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Hi,

I am at a bit of an impasse; I really cannot find a reasonable way of efficiently chelating individual metals with “household” items.

So far the recipes seem to be working well, they really are not for “dry dosing,” but work well mixed in a slightly acidic solution (<pH 5), either as a stock solution or as the “dry dose” amount and mixing (distilled water is best) it prior to dosing.
A little vinegar (acetic acid), lemon juice, Vitamin C (ascorbic acid) anything ...

Hi


I think you can easily substitute Ferrous Gluconate, C₁₂H₂₄FeO₁₄●2 H₂O.

In ferrous gluconate, properly Iron (II) gluconate, the gluconate, which is Gluconic acid, C₆H₁₂O₇ (the sugar in honey and fruits), is the chelate.


The problem is that gluconate; a much weaker chelate then EDTA.

I have not tried this and I am do not smart enough to know whether the excess EDTA picks up any of the iron from the ...

Hi,


In this “idealized” iteration, I am using readily available Fe₃O₄, Iron (II, III) oxide for the iron.


Since Plantex Nutritrace CSM has 7.0%, Iron and the Tom Barr recommended 5:1 Fe: B requires 1.4% Boron.
"Plantex Nutritrace CSM™," “CSM” stands for Chelated Secondary Micronutrient comes without Boron, hence the “+B” is added by the remarketer, popular aquarium plant fertilizer marketers mix 1 part Solubor to 25 parts Plantex ...

Hi,

This is probably the closest to real, live CSM+B.

Zinc oxide, ZnO is readily available in many places and for those concerned adds no sulfate.


Solubor, Na₂B₈O₁₃ ● 4H₂O is a readily available substitute for Borax and is what many add to “CSM” to get the “+B.” Solubor also adds half the Sodium of Borax.

Generic form w/ Mn (II) SO₄● H₂O, ZnO, Na₂B₈O₁₃ ● 4H₂O
EDTA, Ethylenediaminetetraacetic acid-------------------------------------------634-grams ...

Hi Hans,


I used MnSO₄●5 H₂O, Manganese sulfate penta-hydrate in the formula; I have been told that the monohydrate, MnSO₄● H₂O is the most common form available for fertilizers. If your Manganese (II) sulfate is “pinkish,” it is the monohydrate.

Generic form w/ MnSO₄● H₂O ,
EDTA, Ethylenediaminetetraacetic acid-------------------------------------------626-grams
MgSO₄●7H₂O, Magnesium sulfate hepta-hydrate, Epsom salt, ------------152-grams ...