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[APD] Water soluble micros needs low pH?
I've come across a Swedish reference on the subject
of how one should mix water soluble micronutrients
(like CSM+B). It says the chelates are rendered useless
if one try to mix water soluble micronutrients with
ordinary tapwater. The chelates breaks down before
they become useful if the water pH is above 4-5.
I use a micronutrient-powder called "NutriSi" (almost
exactly like CSM+B) that has 50% EDTA and 50%
DTPA iron. I get iron-deficiency-symptoms even if I
dose the equivalent of 1 ppm Fe (10 times the
recommended 0,1 ppm) several times a week. I roll
it with tapwater (pH 8, KH 2, GH 3, Ca 22 ppm,
Mg 2 ppm), but after this I think I will try to get some
citric acid to lower the tap to pH 4 before I mix it with
Would it suffice to use distilled water or do one need
to use some kind of acid also?
(This is a cross-post from the fertilizer forum at
Daniel Larsson, Sweden.
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