Quote Originally Posted by xcrispi
It's a must .
You gotta get rid of the old depleted co2 before replenishing it w/ new .
Crispi :stoned:
I agree... You wouldn't want to breathe old stale air all the time, would ya? Neither do your plants
dooobster Reviewed by dooobster on . venilation a must? i was wondering if its possible to grow without ventiliation,,i have a co2 release system,,n a dehumidifier...thanks guys Rating: 5