"Don Geddis" wrote in message ...
"unclenorm" wrote on 28 Jan 2006 02:0:
PS to answer Don Geddis there are about 70 elements and trace elements
regarded as important to the marine hobby.

You assert this, but can you provide backup? What is the list of 70?
"Regarded as important" by who? I've been doing this (home reef tank)
for a few years, read a lot of books, and haven't ever seen such a list.

The common ones that you see in all the reefkeeping books -- for example
the nitrogen cycle, salinity, pH, phosphates -- probably numbers 10-15
molecules.

I'm really curious where you get your list of 70. And, more specifically, what
they are.

I did a quick search and found this (note: number 70 mentioned):

http://saltaquarium.about.com/librar.../aa012003d.htm
http://saltaquarium.about.com/cs/sea.../aa090503b.htm