CarboAir Inline Carbon FiltersCarboAir Inline Carbon Filters Premium Odour Control for Professional Grows If youre running a larger grow or a closed loop system, inline carbon filters like the CarboAir Inline Carbon Filters give you the best possible odour control and airflow performance. Built to a higher standard than standard stubby filters, these are designed for serious growers who want the best extraction setup possible. CarboAir Inline Filters give you a much cleaner