Best Carbon filter?

okay guys i have had a carbon filter a big one with 50lb of carbon and it work good for like 4-6 months but now its letting alot of smell out so thinking to invest in a nice one please reccomend the best, i have heard good things about some new ones that weight alot less but better carbon but dont know the name. also i have normal humidity of around 40% so a filter that does okay with humidty would be nice too
thanks for your advice it is apprciated

i have heard good things about mountain air carbon filters. i have had alot of recommendations from people telling me to invest in one. here is a link if you would like to check them out. this is the first link i found so you may want to look else where. http://www.westcoastgrowers.com/carbonfilters.htm

I use a phresh filter.....works really well. Most carbon filters work fine up to about 60% humidity.