Interesting

[fatheadminnow]

http/www.pubmedcentral.nih.gov/articlere...cgi?artid=92966

-FHM

 

[rewlyn]

please translate, it does sound interesting (was not to good in science, thanks to those abbreviations)

 

[smbgpd]

Some bugs can use (eat) urea as a nitrogen scource at pH between 4 and 7.5 but not utilise ammonium as a nitrogen scource. This is because urea diffuses into the bugs regardless of the pH of the liquid in which the bugs are grown whereas ammonium needs to be actively uptaken and the bugs do not have the machinery to actively uptake ammonium. This explains how soil can become nitrified (ie nitrogen enriched) when the pH of the soil is below 7.5.

Hows that?

 

[mixmaster jay]

cool stuff quite interesting

 

[Bignose]

Some bugs can use (eat) urea as a nitrogen scource at pH between 4 and 7.5 but not utilise ammonium as a nitrogen scource. This is because urea diffuses into the bugs regardless of the pH of the liquid in which the bugs are grown whereas ammonium needs to be actively uptaken and the bugs do not have the machinery to actively uptake ammonium. This explains how soil can become nitrified (ie nitrogen enriched) when the pH of the soil is below 7.5.

Hows that?

It is interesting stuff, but isn't all that applicable to fishkeeping. Urea isn't a big component of fish waste, and soil chemistry is quite different than aquatic chemistry.