A further reason why silver is remarkably effective against pathogens in granulated ceramic media is that there is a huge amount of surface area  on the combined granules.  This far exceeds that surface area that's typical of monolithic ceramic filters.

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A further reason why silver is remarkably effective against pathogens in granulated ceramic media is that there is a huge amount of surface area  on the combined granules.  This far exceeds that surface area that's typical of monolithic ceramic filters.