It is known for having a sand-filter well that purifies water drawn from the muddy fishponds, the only source for drinking water in the area.
In addition, particulate solids can be prevented from being captured by surface charge repulsion if the surface charge of the sand is of the same sign (positive or negative) as that of the particulate solid.
George Sand | sand | Sand River | The Sand Pebbles | Spartacus: Blood and Sand | Sand Mountain | Sand Hutton | Electronic filter | Carved in Sand | Cape Flats Sand Fynbos | Sand Point | Giant Sand | Digital filter | Cherry Filter | Air filter | Vebjørn Sand | Tunbridge Wells Sand Formation | Singing sand | Shauna Sand | Secret of Cerulean Sand | Sand River (Free State) | Sand Lake, New York | Sand Hill Road | Sand Creek High School | Sand Creek | Sand Beach Church | Salvation on Sand Mountain | Photographic filter | Ohne Filter | Kalman filter |