Air Carbon Filter 4 Inch ,Smellines Control Removes 3X More Odors Contaminants. Australian Virgin Charcoal, Carbon Filter for Grow Tent, Hydroponics, Pre-Filter Included (4inch)

I only just set it up an hour ago and wow the difference is amazing. Im using it in combination with a Hon&Guan 4 inch adjustable vent fan set on low speed and its a bit hard to tell for sure yet but it seems like it has removed 95 percent of the smell, possibly all the smell if i stopped opening the tent. Product looks quality and functions like quality. Size is fine. Was able to tuck it inside my 2×4 tent along with the fan though I did run it upright with a 90 elbow so there is room for the light. Maybe the best $26 ive ever spent.Edit: after 2 weeks it means to be working less efficiently. Next time I will run 2 of these filter. 1 on the inlet side of the vent fan and 1 on the out side