Well, first you are way off on your numbers.it is .002 ppm


Second

"If the earth is made up of mostly iron, should there not be a high iron
content in the world's oceans? "

No

Why isn't there?

Try reading these
http://www.seismo.unr.edu/ftp/pub/lo.../interior.html

http://www.mbari.org/news/news_relea...MUSE/MUSE.html

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"George Burnt" wrote in message
...
: According to what I've read, the iron content in our aquariums should be
: almost nil. When I lookied up what it is in the oceans, it was almost nil.
: (0.000006 ppm).
:
: Well here is my question for all you geology/chemist brains out there.
:
: If the earth is made up of mostly iron, should there not be a high iron
: content in the world's oceans? Why isn't there?
:
: And that is my question of the day.
:
: I am just curious, it is not important for my tank, as I don't even test for
: iron.
:
: GB
:
: