20 pounds (approx. 0.11 cubic foot). #8 Garnet is a high hardness, high density filter material used as a support bed in backwashing filters with heavy medias such as Filox, Pyrolox, Calcite, Filter Sand, Chemsorb, Birm & Greensand. (This is enough gravel to re-bed one auto backwashing filter with a tank diameter of 12" or less.)
Garnet Specifications