Are smaller micron pre-filters (1 micron) better than 5 or 10 micron prefilters?
Smaller is NOT better in this case! The prefilter’s (filters before the r.o. membrane) function is to pre-treat the water so the membrane can most effectively remove the contaminants. In other words, the reverse osmosis membrane is the hero, not the pre-filters. Using a 1 micron pre-filter will very quickly clog up your system before the dechlorinating ability is used up- so you have to change your pre-filters very frequently!
