This is a .2 micron ceramic and carbon filter. Most Bacteria's size is between 0.5 and 1.0 microns in size.

Ceramic filters typically last from 1-2 years depending on water quality and number of gallons filtered.

The Adya Natural, 4-Layer Earth Carbon Filter filters water through 4-layers of earth, which include, activated carbon and zeolites.

4-Layer Earth filters will filter approximately 300 gallons of water before replacement is necessary.