would this setup work?

Just a grow tent, no ventilation other than portable fan inside the tent. LED light (no heat), grown in soil, and this cheap CO2 kit http://www.ebay.ca/itm/Complete-DIY-CO2-system-Kit-planted-marine-aquarium-/250830159964?pt=LH_DefaultDomain_0&hash=item3a66a4805c#ht_4048wt_1110 . How bad would the smell be? are those tent sealed enough for smell? how often I would have to replace my co2 mix in those 2l bottle... every other day^?

Looking for comments on the idea thanks