If you can find them (I have several) luxfer made a tall 30cf tank that makes a perfect back mounted pony. They are tough to find though.
Although Personally speaking, I wouldnt have straight air in a pony, I'd have probably 30%, as even at 130ft, its just under 1.5PPO, and you can easily breath that if needed. If its a stress situation, abit extra O2 is always welcome.(and less nitrogen)
- I got a good squirt in my mouth
- I would imagine that there would be a large amount of involuntary gagging
- I don't know about you but I'm not into swallowing it
CCR discussion on Caustic Cocktails.