1. #1 Filter Sand: A washed and dried silica sand that meets or exceeds the American Water Works Association B-100 requirements for potable drinking water.
2. #2 Filter Sand: A washed and dried silica sand that meets or exceeds the American Water Works Association B-100 requirements for potable drinking water.
3. .5MM Filter Sand: A washed and dried silica sand that meets or exceeds the American Water Works Association B-100 requirements for potable drinking water.
4. 1/8 - 1/4" Filter Sand: A washed and dried silica sand that meets or exceeds the American Water Works Association B-100 requirements for potable drinking water.
5. 1/4 - 1/2" Filter Stone: A double washed silica stone product that meets or exceeds the American Water Works Association B-100 requirements for potable drinking water.
6. 1/2 - 3/4" Filter Stone: A double washed silica stone product that meets or exceeds American Water Works Association B-100 requirements for potable drinking water.
