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Sand Media TechnologyAGF <strong>Filter</strong> - The Principle• Sand Media filters operate by separating the suspended materials in unfiltered water as it flowsthrough a bed of media in a pressurized tank.• The recommended filter medias - crushed basalt, quartz sand or catalytic media, have manyvarying aperture sizes that cause the water to flow through a maze of passages on its way fromthe inlet to the outlet of the filter.77