Carbon filters are most effective when they are placed near the top of your grow tent - the higher the better. But how do you hang I up there you ask?
With Hydrobuilder's Carbon Filter Hanging Straps it make the job easy as can be. Simply loop the strap around the top hanging bar in your grow tent and connect the end, leaving enough space to slide in your carbon filter. Next grab your carbon filter and guide it in the opening and tighten the strap around the filter until it can safely hang on it own.