So basically I turn my tank on 1.5 on the Meater of the regulator, and the tank was empty in Less then a week, what a waste!!!! On top of that I have my lights air cooled, so air is constantly pulling threw the 2 lights and outside the room, I can't turn the fan off or it will get very hot.... So basically what I am asking is, can I just flood the room with CO2 at night???? I want to have it flood the room for 15 mins, every 3 hours at night while the inline fan is off, which is during night cycle while the lights are off.