Craigslist co2/argon tank?

[borovy3488]

The only listing on craigslist I could find was for a co2/argon tank. Trying to find one for my new kegging set up. He said its for welding. Is it a co2/argon mixture or either co2 or agron? If I bought it would Airgas exchange it for a 5 pound co2 tank?

Here's the listing:
http://knoxville.craigslist.org/tls/2617903574.html

 

[audger]

mixed gasses often have different valves (CGA 580) than regular CO2 valves (CGA 320). CO2/argon would be a mix, not either or.

you also dont want argon in your beer. if you are going for mixed gas, aka "beer gas", its CO2 and nitrogen.

some places take exchanges, some wont. depends on the company and the quality of the tank. call them to find out.

these guys have some info about tanks...
http://bvrgelements.com/cyl_products.html

 

[EdWort]

If the test date was still good, they probably would. It also depends if they have tanks ready to swap too.