Quote Originally Posted by f4n70m View Post
hey anyone who has a co2 chamber may be able to answer this.

Anyways i got a Co2 canister. Remote on the way. So my question was. The tubs you use as ur gas chamber. Is it air tight? If so how?

Because all of my tubs obviously have a space between the lid and the tub, does this not matter?
No need for air tight. The CO2 is heavier than the air in the tub. As you add CO2 the air will be displaced out the top. I usually just turn my CO2 on as low flow as possible and leave it running till the rodents stop breathing, then wait another full minute, shut the gas off, wait another 2 minutes.