The Green Pad CO2 Generator is an easy to use way to increase your CO2 in a small area without the bother a a full CO2 tank set up.
One pad will help bring a 4' x 4' x 8' space up to 1000ppm for 4 or 5 days. No fuss or mess. Just hand and spritz a bit of water on the pad and let the grow room humidity keep them going. Add a new one every 4 or 5 days. Leave the older ones in for another 7 days or so.