This is a pic of the main things you will need. They include....
1 Co2 bottle. I use the 20 oz. Paintball gun bottle
1 10' section of aquarium plastic air hose
1 Seal-able container that will be big enough to hold the prey
1 One container without a lid. I use an ice cream bucket
1 adapter with a shut off to hookup the bottle to the chamber
Now you can see in the pic that there are few other things but this list is the main stuff you will need. I will ge to the other stuff shortly