Additional Details ------------------------------ Product description: Anthracite Water Treatment Media 1 cu ft 52 lb - #2 Anthracite (2.0-4.0mm) 1 cu ft Yellow Bag MED-ANTH2. Anthracite Water Treatment Media 52 lb. Features: Unique density allows anthracite to be combined with other filtration media in multi-media filtersAnthracite media is a select coal that is mined and processed for water treatment applications. Crushed anthracite makes an excellent medium density filtration media that effectively filters sediment and turbidity and is commonly used in multi-media filters. Color: Black Bulk Density: 52 lb. Hardness: 3.0 - 3.8 (Mohs Scale) Effective Size #1 Anthracite: 0.6-0.8 mm #1-1/2 Anthracite: 0.85-0.95 mm #2 Anthracite: 1.7-2.0 mm Bed Depth: 24-36 in 10-18 in multi-media bed filters Freeboard: 50% of bed depth (min) Service Flow Rate: 5 gpm/sq. ft. Backwash Flow Rate: #1 Anthracite: 12-18 gpm/sq. ft. #1-1/2 Anthracite: 18-25 gpm/sq. ft. #2 Anthracite: Use Air Scour Backwash Bed Expansion: 20-40% of bed depth 50 Bags Per Pallet A7052 Media Resin Chlorine Taste Odor Media Iron Removal DI Resin Nitrate Removal