Not sure if this is going even going to work but I made a exhale box. Ok so black tub 2 holes. Fly screen over one hole and ducting out other side (pic1). Ducting up to a box which I taped to the box itself, inside the box is a carbon filter, that filter is connected to duct and air sealed (pic2). Duct then goes to inline fan into tent, (pic3), this is ducted to half way down the tent In behind a fan blow above the plants.
The tub is filled with pic 4. Mushroom compost plus mycelium. My ladies just entered their second week of flower, hope it works. What do you guys think??