I've been digging and searching and finding loads of information about carbon scrubbers for indoor grows. I'm just getting started and have a "prototype" that needs some work. Before I go spending any money on it, what are you guys/gals using? Did you buy one? Which one? Are you happy with it? Did you make one? Activated coal vs some sheet of something? are you happy with it? Do you have any instructions? I started with a mini keg, made out of thick aluminum. I cut 1" slits about 1" apart all around it almost the whole length of it. It's about 6.5". I then lined it with screens, like for a window. I found a 1 gallon plastic bottle, slightly smaller than a milk gallon but bigger than a half gallon and did the same slits in that. I put a panty hose around it to keep the activated charcoal out. I need to get a reducer to make my exhaust pipe/fan fit with it. I'm just not sure how good it's going to work. I don't want to spend anymore time on something that everyone has abandoned, so what are you using? How does it work?