Thanks Swampman and Sauce for the kind words.
2 reasons why the carbon filter is on the floor......
1) Humidity uses up the carbon faster in my opinion, being hung from the top of the tent, where the moist heat is.
2) I run LED and want all the heat to stay inside to better regulate my temps, whereas MH/HPS you want to vent the heat through a cool tube or the carbon filter from the ceiling because the HID(MH/HPS) gets the tent too hot and heat rises. Led runs pretty cool all year long, and I dont have heat issues most folks do in the summer. In the winter is where I pay up because with Led, your room temp is about your tent temp + or - a few degrees, so in the winter time, we crank the heat up and run around in t shirts and shorts!!!