can human urine be used to cycle a tank...
i heard this many yeas ago... 5 ml per gallon...
theorically this should work but its kinda gross..javascript:emoticon('', 'smid_31')
smilie
Human urine is also not quite the same as fish urine in that it is basically like two ammonia molecules joined together by a carbon and an oxygen. I wonder if it takes another bacteria to break this down to ammonia or if it will spontainiously breakdown somehow in the water. I doubt the latter as urea is disolved in water in your pee.