Titan Controls Atlas 7: CO2 PPM ControllerThe Titan Controls Atlas 7 CO2 PPM Controller will help you manage grow room CO2 , and keep yourself safe at the same time. Gone are the days of guesswork when it comes to adding carbon dioxide to your tent or grow room. You can easily fine tune your setup with this controller to produce explosive yields and help your plants achieve their full potential! Easy CO2 Management With The Titan Controls Atlas 7: CO2 PPM Controller When growing outdoors,