That's how I, and many others, do it.
I do get some bubbles out the other end though.

--
Graham Ramsay
Learn about the work of the JREF
www.randi.org

"Triffid Farmer" wrote in
I've set up a Yeast CO-2 system and have been toying with different ways of
diffusing the gas into the tank.
Last night I hooked the CO-2 line directly into the inlet of my canister
filter.

Has anyone tried this method and or am I barking up the wrong tree?