What is 20 silica sand used for?

Number 20 silica sand is used in swimming pool filters to catch particles that are between 20 and 100 microns. Silica sand filters are one of three main types of swimming pool water filters.

The majority of experts say that silica sand pool filters are the easiest to maintain because the sand they contain only needs to be replaced every three to six years and they require infrequent repairs.

Silica sand is naturally occurring. Some of the world's most beautiful beaches are made with thousands of grains of silica sand. This is the result of quartz that has been ground down by natural processes over time, accounting for its powdery feel and white color.