Life's a gas

[raiderman]

I'm carbonating a cornie and the neddle on the regulator has dropped just into the red. Obviously it's running low but any idea anyone on how much use I'll get out of it before it runs out of puff?

[McMullan]

None. Get it off there and get a refill. All you're getting now is the questionable crap that lurks in the bottom of most CO2 cylinders.

[rpt]

Why is it now crap? Surely all that the needle dropping into the red means is that all the liquid CO2 has gone and all that's left is gas.

[raiderman]

I must admit I'd assumed I was just running out of gas. The question being how long before I loose the ability to deliver beer!