Hi guys, New member here. I recently started a bit of a feeder project. I've been looking everywhere for CO2, and all the big gas houses want me to lease a tank, which is sort of ridiculous as one fill will probably be good for life. Can't seem to find a tank cheap locally (or in Canada at all for that matter).

So - I've got a big tank of mig mix for my welder. It's 75% argon and 25% CO2. You think this would work ok, or is the CO2 concentration probably too low? I'd like them to have CO2 based passout and die, as opposed to possibly suffocating? on the argon and being in pain. Googling shows that straight argon is ok on birds, but couldn't seem to find much info on rodents, or on the mix.

Guess it can't hurt to try it and see how much the rodent seems to object to it. Just wondering if anyone else has tried this before, before I bother...

thanks guys