I bought a carbon filter hoping to combat the wonderful smell of my grow room. It seemed to work great until about week 5 of flowering, which is when i need it the most. I dont have a brand name of the filter because i dispose of packaging immediately.Six inch output, 2 ft long, and about 12 inch diameter, i paid around 2 hundred for it. Am i expecting too much from this filter?? At this point it isnt filtering ANY smell. I forgot to add that this is the first grow on this filter.