Good for tiny room
I got a co2 monitor and in a small room it did nothing. But in my grow tent it did actually lower the co2 by a couple hundred... Not sure if this is needed in a grow tent as plants use co2 to grow. I took it out. But unless your in an office or a tiny home I wouldn't buy it. I just put it in my kids room for piece of mind I guess.
Rating: 3 stars