Ask An Expert. Ask any water or equipment question; receive a detailed answer within 24 hours. Superior Water Filtration. Cleaner, lighter weight, highly angular crushed recycled glass provides an amazing 25‰ improvement in turbidity removal over silica sand and is equivalent to ZEOlite.
Filter Sand and Gravel are naturally occurring, river washed, glacial deposit products. Their excellent chemical properties - high in silica content and low in soluble calcium, magnesium and iron compounds - meet industrial standard specifications.