The filter in the top tank is composed of highly compressed ceramic with an absolute pore size of 0.2 microns in diameter while most bacteria and protozoa are 0.5 – 1.0 microns in diameter. It’s the filter’s first stage of filtration as it traps bacteria, protozoa, particles, and other contaminants from entering the 4-Layer Earth Filter in the bottom tank for further filtration.
The filter in the bottom tank is composed of four layers of activated carbon, zeolites, silica sand, and ion exchange resin that trap bacteria, protozoa, and other contaminants and help reduce bad odors, tastes, and other compounds.
Activated Carbon
Activated Carbon has been used since ancient times (1200 BC) to purify water. Activated carbon is “activated” by heat and oxygen to create a high surface area that absorbs a broad range of contaminants frequently found in water.
Zeolites
Zeolites are microporous, aluminosilicate minerals with a unique cage-like structure that makes them useful in many ways, especially in water filters. Their ion-exchange and absorption properties are used to reduce odor and clean heavy metals and other natural compounds from water.
Silica Sand
Silica sand is commonly used in water filters because of its highly absorbent qualities to remove granular contaminants, suspended solids and colloids.
Ion Exchange Resin
In water purification, ion exchange resin is used to remove poisonous and heavy metal ions, replacing them with more harmless ions, such as sodium or potassium.