[MrJG]

I'd always been under the assumption that when people do diy co2 that they spend a few bucks on co2 proof tubing but I have the feeling that lots of folks just use whatever silicone airline tubing they have lying around. If from what I read is true there could be up to a 20% loss of co2 using regular tubing so its really worth it to go ahead and get some.
I too have been keeping some of the more difficult Erios with a Jello DIY setup and a small ceramic diffuser with great results. Just figured I'd point out to not skimp on the tubing!