CO2 Should i use it?

Should i use CO2 system i here that this would be goog if i could aford it.

I can buy a system at my local Hydoponic store for $300 with a full tank, anyone useing co2 that can give me some feed back.....Thanks.

If your using co2 then your room has to be air tight.

Well yeah! U can get, Co2 Boost, for $130, good for 3 months, refills are a hunnit. Google it.