FISHLESS CYCLING OF TANKS
rather than getting the RIGHT kind of ammonia and getting the RIGHT amount in the
tank, a pinch of Hikari Gold fish food for a small tank up to a tablespoon in a 75
gallon can be tossed into the tank, the heat set to 82oF and plenty of aeration. In
3 days or so watch the ammonia. If no ammonia is seen add more food.
http://weloveteaching.com/puregold/care/care.htm