One of those little cartridges wouldn't last a day, you need an actual tank and a regulator. I have a small set-up with a 20lb tank, I still need to get it refilled every 7-10 days.

They make a product called CO2 Boost and it is a bucket of organic material connected to a fish tank pump. The material in the bucket gives off CO2 gas and the pump brings it out of the sealed bucket and delivers it to your plant. This is the cheapest most simple way to get CO2 enrichment.
20dollarholla Reviewed by 20dollarholla on . CO2 Cartridge for Cabinets Has anyone seen a CO2 setup using the co2 cartridges? It seems like one of those would go a ways in a small cab? any thoughts or product links to checkout? Something like a whippet cracker, but with a pressure regulator on it...... :toilet_claw: - :jointsmile: Rating: 5