Pete>Thanks James for your info also (didn't know only sharks createurea). Notice it's not quite in agreement with Toms ;) (with NH4, fish load and algae)
NH4 is ammonium, which is excreted through the fish's gills. Urea is pee. Just because urea contains NH4 doesn't mean that all NH4 is urea. Now, I could be wrong about this, and it is really just a minor point.
I must say that I did find James' info interesting.
Shawn Richardson www.skrichardson.com
Urea is actually a specific chemical with the formula CO(NH2)2. You are referring to 'urine', one element of which is the chemical Urea. http://en.wikipedia.org/wiki/Urea
-- Andrew McLeod thefish at theabyssalplain_freeserve.co.uk
This email was scanned carefully before transmission to remove any content, information or relevance. _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://www.actwin.com/mailman/listinfo/aquatic-plants