I sampled this from a PDF I have on cultivation: "CO2 Supplementation yields dramatically larger flowers than growing without adding CO2. The idea is to replicate earlier geological conditions when atmospheric carbon dioxide levels were higher and plants grew far larger than they do today. The ideal level of CO2 is between 1500-2000 ppm. There are many ways to add this CO2. CO2 moves very easily and weighs more than oxygen. Because of this you will want fans to be off during the period in which you are supplementing CO2. Because plants only utilize CO2 for photosynthesis you will only need to supplement during the lights on period." This seems to be saying that the fans must be off ALL day. CO2 is a daylight supplement and fans off during supplementation?!? Furthermore, the CO2 boosters that I am thinking of buying say to take the emission hose and hang it on the fan so as to blow it onto the plants. Any feedback might be helpful!