First grow... couple of questions...

[bigducky79]

Growing for first time in small closet... Got a vent hooked up so i have constant clean air flow. Because of this, do i still "need" to have extra supply of CO2 hooked and if so whats the most convenient way of supplying it to the room?

[URACOTTONPICKER]

no you dont need the extra co2 if your getting fresh air from outside. co2 always helps so if you can use it. do you mean convient as in price or as in actually using. you can alway buy a co2 tank and regulater but if money is a issue you can make your own co2 by using fermentaion or dry ics i think baking soada and viniger works too