[APD] too much iron in water?

[Robert Chady <aquatic-plants at chady_org>]

Haven't posted for a while so I figured I'd post my latest question.

Namely, is it possible to have too much iron in the water for plants?  I ask
because our raw well water has 18ppm (yes, 18, not .18).  After it has been
let to stand for a while, it turns a real nice caramel color, heh.  I am
trying to stay away from having to use R/O water and I have proven to myself
I can't reliably use the water from our filtration system (softened big
time).  By default our water is soft, acidic, with a very high iron content
with some tannins.  The soft/acidic part I can take care of easily as long
as the iron isn't going to be a killer for me.

Also, if the plants (hopefully fish too) are ok with that much iron, will
they suck it out of the water in time and get rid of the coloration?

Thanks in advance,

Robert
--
Robert Chady
Cadott, WI (where everything is white these days!)
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