In what position is a greensand filter typically placed?

A greensand filter is typically placed above the anthracite layer in a multi-media filtration system. This arrangement allows for the effective treatment of water rich in iron, manganese, and hydrogen sulfide. Greensand has a specific property that allows it to oxidize and remove these contaminants effectively, and by positioning it above lighter media like anthracite, it ensures that the heavier particles are filtered out first, maximizing the effectiveness of the greensand layer. The anthracite layer serves as a support medium, capturing larger particles and providing enhanced filtration without compromising the water flow through the greensand. This configuration not only optimizes the filtration process but also helps in maintaining the quality of treated water.