Hey Chubba420, The scrubbers works great. My roommates can't smell a thing coming from the grow room (The forest consist of 100 plants). The guest didn't noticed anything foul odor either. The real test will be during drying after harvest. I think they will do fine because these are upgrades from the smaller scrubbers, also DIY. Even with the previous scrubbers when drying they worked. The new ones got more air flow which will increase the rate of cleaning the air.
Got two scrubbers identically with the same setup. This one is by the closet scrog grow. The other, by the flowering tents. Basically I use a plastic container with 4in opening top (fits nicely with the 4in Vortex) with holes 360 around the container for better airflow. This one is an upgrade from my previous DIY scrubber which had limited airflow and much smaller, but still works great. When the closet is closed (during 12off) I move the unit by the door when the other two flowering tents are open (12on for the tents).
I use these activate carbon inside the plastic container. Washed them before use (like hydrotons) or they will be very dusty, hehe. Got a 50 pound activate carbon from fish store for $45. 1 pound worth will lasts 3 months!
I know it's very homemade but they're awesome. Might get one of my industrial designer friend to create a more stylish piece with the same concept and size. heh