Yes the "welding gases" are inert, but they mix. Like 75 argon 25 co2. How do you get both gases out the end of your mig gun? They mix. The problem with the gas tank is you do not know how much Argon it will take to be 100% none flammable. Dryice is the heavest of the inert gases and there is 100 times more gas in dryice vs a bottle of argon. So drop a bunch of peices in let it gases off. Don't guess with "welding gases"
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