Thanks mr. Potpimp
...good ideal...im thinking of trying this on a smaller scale, like maybe a maxwell house square 3 lb coffee container, with a computer fan taped in the bottom, with a piece of window screen holding in the charcoal....but while i gottcha here can I ask your opinion on lights? I noticed you said you where using floral tubes and was wondering what you thought about hdrofarms 2' x 8 t5 tube system, in a small confined cabinet 25'' x 25 ''x 4'. ( will these, with quatum 2900 bloming tubs do a good job on 4 plants). I cant make much heat in this little space under the stairs.
Also back to the diy filter, does plants really put out so much odor that ill need to make these filters? I have a couple peope in the house I would like to keep this secret from, do you think this is possible? thanks