Or even this http://www.reptileforums.co.uk/forums/equipment-classifieds/668942-co2-chamber.html :whistling2:
Aquarium hose is what I used,
Think that what most people use :whistling2:Have got the gas and the regulator. Just looking for the hoze now. Was thinking along the line of fishtank air line if all else failed but want the proper hose if available for a good fit.