I need a carbon filter, my rooms starting to get skunky. I have a 6in centrifugal fan hooked up to my 1000 watt cooltube in a 7x7x7ft room The CFM of the fan im not exactly sure on but its probably a low-medium end model with low-medium power nothing special. I bought it years ago and cant remember the site. Im looking at these two filters: Amazon.com: LED Wholesalers GYO2301 6-Inch Hydroponic Carbon Air Filter 470 CFM With Air Scrubber Oder Control: Patio, Lawn & Garden this ones 470cfm Amazon.com: LED Wholesalers GYO2306 6" Hydroponic Carbon Air Filter 310 CFM Air Scrubber: Home & Kitchen this ones 310cfm 1) I need help figuring out which one to purchase... Is one of these just larger than the other? Or more thick and more resistant to airflow or something? Which one is best for me? 2) How much airflow will be reduced by installing one of these? Ive read anywhere from 20% to 50% less? My plants are at the max height of the tent nearly and they might suffer a bit of heat stress with reduced power, so im just wondering! Could really use assistance need to order this within the next couple days Really appreciate the help blades !