Hey guys, i'm not new to growing but i have never used a carbon filter because i always grow 1-2 plants at a time this time i want to grow more, well i have a cabinet that is about 4 1/2 ft high and 5 feet ft wide. Does anyone know what size carbon filter is right for me? the smallest one i found is 20 inches long and has a 5 inch diameter. if someone can link me to one that is possibly right for me that would be very helpful thanks .