I've had my wet/dry filter running for around 4 months now, and need a better pre-filter option. I want something I can rinse and re-use cause I've become obsessive about changing the pad. Currently poly fill from walmart is being used, witch works perfect, but has become a hassle to cut a new pad every 2-3 days(told you I'm obsessive) So I'm looking for some kind of cut to fit type fix that I can just have 3-4 of them and swap em, then clean em when I get down to one. I wish I had the option of a filter sock, but I don't... but I'm looking for similar results. Also if someone could suggest what micron would be good for a wet/dry running approx 400 gph.