tube in my co2,
 

Ron, If i plan to tube in my co2, won't the fan on my plants blow the co2 away from them? I'm gonna make it with via fermentation. Where should I position my fan? Thanks, - wanting the gas

That is always a problem. You need to make the room as air tight as possible, then it wont mater if it blows around.
co2 is heavier than air so it will eventually float to the floor so the fan will blow it around so the plants will have a better chance of utilizing it.