Noob Question

Hey guys I have a PC grow box and it has a 92mm computer fan exhaust.Do any of you have any ideas of how I can add a carbon filter to this?--thanks guys

perhaps some carbon in a nylon stretched, filled, and attached over the outside sealing the edges with good ol duct tape ?? just a perhaps.. never tried it lol. but interested to know what you decide on.

try a sheet of carbon prefilter (its like a fabric kinda) just tack it over your fan