question on carbon scrubber's

Quick question i need a carbon scrubber i just dont know what size to buy. the room is aproximitly 12x12x9 so 1300 cubic feet i guss.

wow, google. how'd you get this far?

forgive me if I'm rude but .... damn.

http://www.4hydroponics.com/

http://hightechgarden.com/