In order to cycle a tank using ammonia, start everything up and add some gravel from an established tank or a few potted plants (their roots contain all of the necessary bacteria, and the plants themselves do not seem to be harmed by this process). Then simply add 4-5 drops of ammonia per 10 gallons per day until you get a nitrite spike. Once you have nitrites, cut the ammonia back to 2-3 drops per 10 gallons per day until the nitrites disappear. When you get a 0 ppm nitrites reading, you have a fully cycled tank.