trimix

[Kirk]

Yeah, if you have a compressor at home, re-compressing helium is rather easy with the use of plastic trash bag. You get funny looks, however, when you return the empty helium and oxygen bottles the next day. Just never tell them that you’re actually going to be breathing it. For liability reasons, they would never sell it to you. Just tell them you’re welding a lot of stainless steel, for welders use helium for that. Call me cheap, but these days it has to be a pretty cool dive for me to spend the money for a T-cylinder of helium for a dive or two.
Kirk