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RE: Aquatic Plants Digest V3 #793

> From: Chris Schmelzer <cschmelz at mcw_edu>
> Subject: Any iron test kit news?
> Many articles listed the Lamotte as the best, but others said that it
> couldn't read EDTA chelated iron (such as that in my PMDD trace mix),
> which makes it pretty much useless...
> Other articles listed the similarly priced Hach (?) kit as the best
> and seemed to indicate it MAY read chelated iron...
> This is a pretty big investment so what should I do???

I went through several of the less expensive brands and got either false
negatives or false positives with all of them.  Eventually I bought the
LaMotte kit and have been very happy with it.

I have heard arguments before about whether or not it (or any other) kit
will register chelated iron.  I'm not a chemist and cannot comment on that.
I *can* say that when I add trace element mix with chelated iron in it the
LaMotte kit registers iron, and when it is all gone the LaMotte kit
registers no iron.

The very act of seeking sets something in motion to meet us;
something in the universe, or in the unconscious responds as if
to an invitation.  - Jean Shinoda Bolen