Hey guys. I've euthanized rats before for my snakes using the vinegar baking soda method but I dont want to use that anymore. I know how to make the chambers for co2 use however I'm not sure what type of co2 i can use. Like do i need a bigger industrial canister or can a bb gun paintball canister work and if it does what do I need to be able to control making the co2 flow out?