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Quote: World Spirit said: What is guaranteed to happen if I don't use Co2 in the grow tent?
Can a successful grow still occur?
Don't worry about CO2 until you have some grow experirence, bro. Just make sure you have at least on fan blowing air out of your grow area and somewhere for fresh air to come in at, preferably a smaller fan blowing it in. but the most important is having a fan blowing the stale air out, as long as you have cracks, holes, etc for new air to come in from. If you are growing in a completely sealed tent then you will need a intake AND exhaust fans, the intake can be a lot smalled of a fan though, just fyi. I am about to start a closet grow where Im gonna have a 4 inch inline fan sucking air up through my sealed light reflector and out of the closet, since the closet isnt air tight(not even close) Im not worried about incoming air because I Know that fan is going to be strong enough to literally pull fresh air in just by pushing stale air out.
Also, it really helps to have a small little oscillating fan inside grow tent to circulate the air inside to make sure every last leaf on every last plant is getting fresh air all the time.
Just remember something, bro, plants are living things, they are going to try their god damn best to live and thrive, despite our best efforts sometimes, lol.