We have the Hydrogen/Oxygen Combo. Go to your local welding store that sells bottles and they can get you set up with everything your need. The torch is the same as you would use with a Acetylene set up but there is a different pressure gauge that is for Hydrogen. Yes we used to use propane but you will get small black spots from time to time. The hydrogen/oxygen is a cleaner burn and we get much better results after we switched.