Now that I've had it done, finally, I think I know why they say to freeze
the bottle first....

In a 'proper' refilling place, they wouldn't have a problem...
but in the back of the pet store, they simply use a very big CO2 bottle and
fill from that into whatever we bring in. They said that as their big
bottle gets more empty, so they can only fill the customers bottle
somewhat.... and if we cool it, then they can fill it more. So it's
probably just to reduce the pressure in the refilled bottle so that more CO2
gets into it from the larger bottle (as far as I understand it)


"Chuck Gadd" wrote in message
...
On Wed, 8 Jan 2003 15:24:15 +0100, "wiggywacker"
wrote:

But I do find it weird, I never heard anyone on this group mentioning it
before. But Belgium is right next door to Germany, where all this tech
comes from.

CO2 isn't unique to anything created in Germany...

Most places in the USA don't fill CO2 tanks on-site, so the temp of
the tank doesn't make any difference. I'd bet that those places that
do fill on-site take steps to cool the tank, like I said, a partial
fill, and then a fast discharge of that fill will cool the tank down
to the point that it will get a thick layer of ice/frost. I've had
small 12oz CO2 bottles for paintball that I couldn't touch bare-handed
for about 15-20 minutes.



Chuck Gadd
http://www.csd.net/~cgadd/aqua