Ditto on: Activated Charcoal and "sediment" size micron range.
If you get the tight "filters everything" you will be changing them monthly and be VERY unhappy with the through put.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW