What are you trying to get from your filter? I use it so I can move the beer around from place to place (I go to a lot of parties) and not worry about stirring up the crap in the keg. If its going to stay in one place(your kegger) leave it and don't waste your cash. I filter most all my beers that I want bright quick. But if you have the filter, use it, that's what you bought it for, just go SLOWWWWWWWWW. If you don't you can DESTROY the head of the beer forever! I use a 3 micron for any of my darker beers that I filter. And a 1 micron for my really light, bright beers. Don't think for 1 minute that filtering is going to make a bright beer instantly. It still takes several days to clear. If I know I am going to filter a beer I will ferment till its done then transfer to secondary for about a week. Then filter and carbonate. My Blonde goes from grain to glass in 20 days and I do filter it to 1 micron.