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Hello DGCers. Thank you for all the info you have shared. RELEASE THE CLAW! Using the DGC discount code I grabbed a 2×4 Gorilla tent. Used code to get HLG 300 light. I want to run co2 but have never done it. Can you do it in a tent being vented in and out? What about a room 8×8? Does that need to be sealed off? How would I seal off door? What equipment would I need? Thank you guys for all you do. Thank you DGCers for sharing your knowledge. I get better every day because of you guys. Am I wrong to believe co2 is really a difference maker? Negatives of co2? If there are any. Not new to overall growing but never touched co2.