Air Carbon Filter 4" with Premium Australian Virgin Charcoal 1 Pair Rope Hanger Included, Odor Removal Carbon Filter for Grow Tent, for Inline Duct Fan, Odor Control, Grow Rooms, Hydroponics

it worked but it was weak, try getting a vivosun instead.

Red iced the smell a bit, but I can stillSmell odor from the 2x4 tent as soon as I open the basement door. Would not recommend.If the company is reading this, I’d like a replacement or refund.

Let me state that I have purchased four separate G- Hydro brand filters (three- 6” and one 4”) over the past two years and thought I finally found a company that offers quality carbon. However, I was in a jam and needed another 4” filter for a 2x2. Received an “unbranded” filter,usually G Hydro stamps their filters on the flange. No markings just a generic filter. The 4” filter they sent absolutely does NOT filter a 2 x 2 flower tent. Very disappointed and let down over this companies quality control. It’s almost like they sent me a used or spent carbon filter.

I wish these lasted longer, but they work great for about 2 - 3 canna grows

Works good