Actually, probably drinking your Urine would be better than drinking tank water. I know we all take pride in keeping our water as pristine as possible, but that still doesn't make it completely potable. The bacteria and other microbes that develop due to the normal biological processes of fish would probably cause stomach issues. It's no different that stagnant water in a pond or puddles. Flowing river water's better ... assuming it's not contaminated.
Remember, we neutralize the chlorine/ chloramines that allow us to drink our tap, so microbes will move in fairly quickly .. oh did I mention algae?
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.