Diatomaceous Earth
Some filters use diatomaceous earth to help filter out contaminants. Commonly referred to as 'D.E.' filters, they exhibit superior filtration capabilities. Often a D.E. filter will trap water-borne contaminants as small as 1 micrometer in size. D.E. filters are banned in some states, as they must be emptied out periodically and the contaminated media flushed down the sewer, causing a problem in some districts' sewage systems.
Read more about this topic: Swimming Pool Sanitation, Typical Filtration Equipment Used in Private Swimming Pools, Filtration Units
Famous quotes containing the word earth:
“Slave to a springtime passion for the earth.
How Love burns through the Putting in the Seed
On through the watching for that early birth
When, just as the soil tarnishes with weed,
The sturdy seedling with arched body comes
Shouldering its way and shedding the earth crumbs.”
—Robert Frost (1874–1963)