With my experience with DIY CO2, it's kinda hard to say how much gas is
being produce or being injected to the tank.

I'd say put it into the venturi. Much easier to remedy in case of problems.

"kush" wrote in message
...
I'm about to start a batch of yeast in a soda bottle which I'm going to
use
to inject CO2 into my power head. Does anyone have an opinion on whether
it's better to feed the bubbles into the venturi or into the riser tube
(no
prefilter)? I can't inject it into my canister because the gas makes it
rattle.

Also, I'm collecting horror stories about exploding DIY yeast systems to
tell my wife while I'm hooking it up (in the living room).

Oh, and I may be looking for a roommate...

Thanks,
kush

"You can't have everything - where would you put it?"