You could get an expensive filter system from one of the several WVO websites, or you could run out to Wal Mart and for $30 have a "whole house" water filter that goes down to 5 micron. I used to not settle in the jugs- I just poured the newly aquired WVO into one of the wifes' nylon leggings, which I'm guestimating is about 300 microns. I would then heat it in a 30 gal drum to about 150* and then run it through a 1 micron sock filter. You'd probably be better off doing it in steps, 200 mic, 100 mic, 50, 25 or 10. The think is- when you're pre-filtering your wvo- you don't want to use any kinda filter that has a bypass- which will pop open early and then the filter is doing nothing for you.