ok I have searched this board high and low looking for a good tutorial for a carbon scrubber. and really haven't come across anything that simply said IVE TRIED THIS AND IT WORKS.. mostly just good ideas that should work.. can someone plz help me out with a cheap EFFECTIVE carbon scrubber?? I feel I've got my box fine tuuned and getting excited.. don't want smell to ruin this whole project... size wise cab is 32 inches wide by 44 inches high by 16 inches deep. gonna run a 4 inch fan that is roughly 175cfm to the carbon scrubber... any handy ideas plzzz?. soon as I get a good idea I'm going to work!

box is going to be inside a closet.. has to be kind of stealthy for when ppl come over..(which is VERY rare still)
p.s. hoping to keep all items inside cab (really don't want to have scrubber on outside of box)