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Re: [APD] Water soluble micros needs low pH?

Without looking it up, I'd say this isn't true.  Water with a pH of 4-5
isn't easy to come by.  Even RO/DI/Distilled should be neutral, 7.0.  We use
chelated iron on a regular basis in the horticulture industry.  Our water at
work is something like 1300ppm hardness pH 7.8-8.0.  The chelated iron works
just fine for us.

As an aside, on terrestrial plants nutrient overdose can have the same
symptoms as nutrient deficiency.  If you're dosing so much iron per week and
seeing deficiency symptoms that weren't there before, it's probably because
you're overdosing.

Aquatic plants and terrestrial plants work differently, so maybe I'm wrong.
I'm sure we'll hear from someone else who knows better.  I'm just a
horticulturist who likes to keep things in glass boxes. :)

Nick Ternes
Port Washington, WI

On 2/2/06, Daniel Larsson <defdac at hotmail_com> wrote:
> 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.
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