My source is just HIS beer tap Also he has a MIG welder with a big CO2 bottle for the shielding gas.

Just a curiosity -- When I saw the mention in an article it made the wheels start to turn, but it seems that unless you had a cheap source of dry ice (I don't) it would never be economical. say nothing about cooling the pool, dry ice being -200+degrees or something like that (COLD)

The chemistry of all these different chemical reactions fascinates me (H+O2 = water). I'd love to see a rundown of all of them in the Geek section of China Shop, when Ben puts that together. I'm sure you would be the A#1 contributor.

Thanks for your EXPERTISE!!