A very very strange question...

It is true, but urine is a poor and impure source.
 
I tried to pee in my tank once. Of course that was after a few six packs and too many drinking games. :dance2:
 
i definetly wouldnt recommend it. theres many more chemicals in urine than just ammonia and they could possibly do harm. i would say its not a good idea at all.
 
AquariaCentral.com