I used to remember the chemistry behind the breakdown of urea, but one of its components is ammonia. For some reason I think they used to use that in gunpowder making. Another fun fact is that the first drug for dissolving clots in heart attacks was urokinase. I was told by a doctor they used to take tanker trucks to sports stadiums and collect the men's troughs. Anyway, back on subject ... for those who like to play at home, the more hydrated the better (thins out the excess nutrients that things grow in and, one of my all time favorites is something called "Odo-ban". That would be f