I wasn't confident with my old panty hose filter so I made one for about $20 that filters out spores, mold, and bugs.
Here's where I posted this. https://www.autoflower.org/f5/$20-intake-filter-42464.html#post818719
Here's where I posted this. https://www.autoflower.org/f5/$20-intake-filter-42464.html#post818719