Not really big........the idea is to raise and hold the level. You need to move the air around under the leafs all the time and a full room exchange every 6 hours. You do not use fluorescents with CO² they do not produce enough light for the plant to process the excess supply.
Zandor Reviewed by Zandor on . Ventilation! Why do i need it? Okay so plants breath co2, right? If my plants are in an enclosed area, with co2 filling the area. And Carbon Dioxide is heaver than Oxygen, than I can keep an all co2 environment, I mean as long as you have an open top for the O to get out. Or am i totally out of it! Rating: 5