Common Culture 20 lb CO2 Tank, Regulator, & Tubing Package ComboA complete CO2 Enrichment Kit: Drive your garden to its full potential with this user friendly, highly effective 20 lb CO2 tank, a CO2 Regulator, and 25' of laser drilled tubing combo. Your plants will grow faster, larger, and more bountiful with the aid of proper CO2 enrichment, and this combo gives you the tools to do it. The combo includes a release kit, which accurately controls the flow of CO2, and a brand new 20 pound aluminum CO2 tank. Tank and