In addition those bags are designed for a 4x4 so if your space is bigger then get more bags, I keep 2 in my space because it’s a 6’x12’ area but I only use 3x6 of it to flower in. Also don’t let ppl tell you that if ur room isn’t sealed air tight that the Co2 won’t help, I have a autopilot Co2 monitor rooms not totally air sealed still over 1500ppm in the air for the plants can go up near 2kppm of Co2 in my room had it up to 3k with 3 bags so cut one bag out but they work amazing