A couple of things that’s keep in mind about CO2. You can get the CD50T which pulls liquid CO2 from the bottom of the cylinder. It’s super cold and you have to have a way of dispersal without getting a terrible static electric shock. I can’t imagine using a 50lb cylinder for what you’re suggesting. I’ve had a valve go bad on my liquid transfer pump letting the liquid co2 escape. The liquid co2 transformed into a gas rather quickly.
Steven