I'm using yeast to, but I have it in ketchup bottles in front of the fan to blw it up since I don't have a shelf, I throw another 1/2 cup sugar i once a week anf shake it up good at least once a day, if not more.

GreenJeans and everyone else, please check out my pics I just got them up and no one's said anyhing yet and I can't wait to hear how I'm doing.