To: Aquatic-Plants at actwin_com
Subject: Re: Urea
From: psears at NRCan_gc.ca (Paul Sears)
Date: Wed, 3 Jul 1996 07:47:23 -0400 (EDT)
In-Reply-To: <199607021939.PAA27642 at looney_actwin.com> from "Aquatic-Plants-Owner at ActWin_com" at Jul 2, 96 03:39:02 pm
> From: larry at creative_net (Larry Frank)
> Subject: Urea
> What is the chemical formula for urea, and in
> what concentration will this be toxic to fish?
Urea is H2NCONH2. I suspect it is not very toxic in itself,
but it will be hydrolysed in water to ammonia and carbon dioxide.
The ammonia could easily be a problem! I would not go above about
0.25 ppm urea in the tank water for just this reason.
Paul Sears Ottawa, Canada