Where can i get a CO2 tank?

[WWWD]

in vancouver you can buy them at just about any welding, dive, gas supply or fire extinguisher shop. in fact that’s where most aquarium shops end up getting them from. just make sure if you buy a used one it's date stamp is current. it should cost around 40 bucks to have it checked and redate stamped every 5 years and around 20 bucks to refill it. the refill place won't refill it if the date isn't current on the bottle.