hmmm... the heck with stability, prodibio start up, and live sand. we'll just package urine and sell it...
I always knew Calgary had the advantage over us in the marine hobby.
Seriously, maybe that store just told you that because one of their staff was caught urinating in the tanks instead of running to the bathroom.
As far as I remember, cycling of the tank is to get all the parameters to stabalize, and start bacteria growth. Isn't urine sterile?
http://en.wikipedia.org/wiki/Urine