I finally have enough funds so that I can expand my set up and use co2. I have researched this and have heard varying reviews. Some say it doesn't really make that much difference, and some say it makes all the difference in the world. I thought I would see for myself.

For my flowering stage I have a space about 3' x 3' x 8' tall, and I use an enclosed hood with a lot of air pumped over a 600W bulb. This air comes from a big inline fan that has a big filter on it, which filters out the weed smell mostly, and airborn debris a little. If I don't have this fan on, temperatures reach 105F within 20 minutes.

My understanding is that plants use co2 only when the lights are on. How can I use it without it all being sucked out of the room, thereby making it useless?

The only solution I can think of is to tear apart my set up and totally redesign it so that the light has dedicated ventilation that comes from and goes to somewhere outside the room, and refrain from ventating the room at all until the temp reaches about 95F (which I imagine would take less than an hour). All my ducts are behind the wall which would really make this makeover a suckie and time consuming experience.

I have never used co2, so does anyone with experience (or not) have any other ideas? I don't see how anyone with an enclosed space can use co2 without the temps getting to hot for the plants, unless they are using flourescent lights for flowering. If that's the case they are not concerned with yeild anyway.

thanks
Opie Yutts Reviewed by Opie Yutts on . I guess I can't use co2 in my set up. Or can I? I finally have enough funds so that I can expand my set up and use co2. I have researched this and have heard varying reviews. Some say it doesn't really make that much difference, and some say it makes all the difference in the world. I thought I would see for myself. For my flowering stage I have a space about 3' x 3' x 8' tall, and I use an enclosed hood with a lot of air pumped over a 600W bulb. This air comes from a big inline fan that has a big filter on it, which filters out the weed Rating: 5