A biosand filter made from OHorizons wooden mold will filter 11 liters each use, this means that it will filter 11 liters each time it is refilled. It is recommended to fill the filter a maximum of four times per day and a minimum of once a day. This means that the owner of the filter can obtain anywhere from 11 to 44 liters of water or about 3-12 gallons each day. A maximum of four refills per day is recommended to allow for long enough rest periods between each operation of the filter.
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