im wondering how people are using carbon filters. i see some people blowing air out the carbon filter and some people sucking air through. How are these to options being used? I will be having 6 1k lights in the room( ex. = = =). i also hear that i dont need an intake fan i can just have a small hole somewhere near the floor of the grow and air would just enter on its own? any advices on how i should do this?