B Bobgrowt Active Member Dec 9, 2008 #1 I am working on climate control in a 4x4x6' h box. I have the AIR-4 unit and it has an outlet for co2. What CO2 device would be recommended (less expensive)? The box is lighted with a 400 wt HID and vented.
I am working on climate control in a 4x4x6' h box. I have the AIR-4 unit and it has an outlet for co2. What CO2 device would be recommended (less expensive)? The box is lighted with a 400 wt HID and vented.
