Iron in SA-waters

[Fredrik.Ljungberg@saab.se]

Hi all!

Some one asked about iron in natural waters during the
A. nijsseni-thread. The only book where iron is measured
is the Mayland/Bork-book from Landbuch Verlag (German Edition).
I hope I won't get sued for breaking any (c) but I'll give
a few examples (Fe 2+/3+ in milligrams per litre):

0.58 mg/l     Rio Arara (Peru)
0.00 mg/l     Rio Parana (Northern Argentina)
1.50 mg/l     Crique Macouria (French Guiana)
0.95 mg/l     Rio Jurua (Brazil)
0.22 mg/l     Rio Negro (Brazil)

Several more in the range between these above are in the book, most
seem to be between 0.20 - 0.40 mg/l. There are no data on A. nijsseni's
biotope to compare.

As a comparison my tap water is < 0.05 mg/l (below measurable)
so it needs the iron. It probably needs a whole lot of other things
as well but iron and CO2 is often enough to get the plants going.

Now, if only someone would go down there, catch some A. nijsseni
for me and measure the iron in the water while bagging the fish ...

//Fredrik

- -- 
Fredrik.Ljungberg@saab.se
Saab Ab 
Flutter and Loads Department
voice +46 13 18 54 60, fax +46 13 18 33 63