I get my gas from my local welding supply company. I went in to get a specific beer gas tank and regulator when i received my new stout faucet. The guy filling the tank was also a homebrewer. He set me up a different way. The amount of beergas you'll go through to push stouts (unless that's all you brew) is pretty small. At that point, he sold me a small 5# CO2 bottle. He said for the size of the bottle, its rated for the same pressure needed for the beergas mixture. This way, I also get to use my CO2 regulator on it, and do not need to go get a separate, "one trick pony" regulator. Works out well, since I already had a second regulator. This is my backup, and I used it for other things as well, such as tailgates, etc.