No CO2 in this tank. Its an expensive ass Excel tank. lol
As for that clear thing on the right side. That is simply my intake tube for my XP3. I'm using 3/4" acrylic tubing (the same stuff I make my drop checkers out of) some of the tubing that the xp comes with that was cut from the main hoses. And the strainer. Its a pretty simple mod and looks much better then the erector set tubes that come with the XP's. I will post a thread on how to do this yourself in a few days. I have to cut some more tubing.