Furthermore, air prevents the growth of anaerobic bacteria which produce the foul odors associated with rotting manure. Actually, this project is going to be free of strong odors if you are careful to avoid getting the dung soaking wet. Fungi require moist conditions for growth. The ball of dung should be in contact with liquid water 2 to 5 millimeters deep. Add water as needed to maintain a dryish surface, but moist inside the dung ball.
Room temperature is ideal.
If in doubt start several jars and keep them in different locations. A succession of fungus species will appear. After a day or two, there may be a few stalks of spores of Aspergillus , and other sugar molds. After a few days, Pilobolus will appear. This genus sends up sporophores shaped like tiny bowling pins standing bottom up.