Since 1917, Red Flint Sand & Gravel has been the leading manufacturer of the highest-quality granular filtration media in the industry. Filter sand, support gravel, gravel (filter) pack for water wells, anthracite, Greensand Plus, and garnet available. Can supply media in small bags, super sacks, bulk, or custom packaging options. Contact sales@redflint.com or 800-238-9139 for your granular filter media needs today!