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How Does a Green Sand Filter Work?

A green sand filter uses manganese green sand to filter iron, sulfur, hydrogen and manganese out of household and drinking water. Water polluted with these materials may stain, smell like rotten eggs, be discolored, taste bad and possibly be unsafe to drink. Reducing the impurities in water can help improve the safety, taste and smell of drinking water.

What Is a Green Sand Filter?

A green sand filter uses manganese green sand to filter iron, sulfur, hydrogen and manganese out of household and drinking water.  Water polluted with these materials may stain, smell like rotten eggs, be discolored, taste bad and possibly be unsafe to drink. Reducing the impurities in water can help improve the safety, taste and smell of drinking water. 

How Does a Green Sand Filter Work?

A green sand filter contains manganese green sand, which forces impurities in the water, such as iron, to oxidize.  The oxidized impurities are then trapped in the sand and held there. Typically, a water purification filter that includes a green sand filter will also include water-purification and disinfectants. 

How Long Will a Green Sand Filter Work?

When the green sand filter has become exhausted, it may be regenerated through the backwash process with potassium permagranate.  When properly cared for and regularly backwashed, the green sand filter will last for many years.

About the Author

Tracy Morris has been a freelance writer since 2000. She has published novels and numerous online articles. Her work has appeared in national magazines and newspapers including "Ferrets," "CatFancy," "Lexington Herald Leader" and "The Tulsa World." She holds a Bachelor of Arts in journalism from the University of Arkansas.