DimeDubEighth
Active Member
My current set up is a 3'x3' tent with a 600 watt HID and 6" inline fan. I have my inline fan running the whole time my HID is on because of temperature issues, and for new air circulation I use passive air intake through an open window. New air from outside is constantly flowing in, but I was wondering if this would be enough CO2 to sustain my babies throughout veg. and flower, or if indeed I would still need supplemental CO2.