Can Filters have a longstanding reputation for consistency and quality for odor sequestration. Used across industries worldwide to tackle the toughest odors and smells, HTG Supply has brought Can filters into the indoor garden space to ensure that when you want an odor gone, it is …gone. Since 1991, Can Filters has been providing top quality odor control to smelly places worldwide. Manufactured in Canada and sold in over 40 countries, Can Filters is a name growers can trust to get odors out of their gardens.