The smaller the micron the smaller the particles it filters out, but it also will clog up a lot faster. I even have to clean out my 100 microns twice a week if I'm being really neurotic or if I feed more than usual. I can't imagine how often J jaws7777 is having to change out a 50 micronDo lower mess socks are better? Im using 200 micron right now and planinng to buy more, what does a lower micron do compared to 200 micron?