I am reworking my water filter system and plan on using a .1 micron sawyer filter with a prefilter, but am having trouble deciding what prefilter to use.
MSR siltstopper 5 micron
Mesh Coffee filter, seams to range from 20 to 200 micron
Inline filter 20 to 250 micron
http://www.mcmaster.com/#inline-water-filters/=gbssck
My question is, what size prefilter should I use? When using a .2 micron pump-style filter I have never had to filter from visibly dirty water, but there were times when what looked like clear water quickly clogged the filter. I am hoping to find a prefilter to avoid clogging the sawyer in situations like this.

