Check out mine! It's a $2 pitcher+$5 airpump+$2 airstone from wal-mart. Not nearly as good as what Illegal Smile has going on, but its easy and cheap. Also it won't work for more than one plant....(thats why i would use a separate pitcher/pump per plant- its cheap and isolates different variables.... also cheap) Maybe it will just give you an idea of how simple bubble setups are.