I was looking for a way to rouse up my yeast in a conical fermenter. I thought of hooking up my C02 system, but I didn't want to unhook it from my system and thought it might be possible that wort might fall back into the line.
The solution for me was a Cornelius Keg Portable CO2 Charger. I had to find a 1/2" to 1/8", which wasn't easy. I hooked it all up and shazzam, it worked!
If you like the idea, but don't have a conical fermenter, I would suggest using a tube and create a connector to the Portable CO2 Charger. I haven't done this part, but if you have an idea, let's hear it.