Crystal Quest Eagle Redox Alloy® 9500, per poundCrystal Quest Eagle Redox Alloy 9500, per pound Physical Characteristics: Color: Brown Density: 171 pounds per cubic foot Crystal Quest Eagle Redox Alloy 9500 This process media aids in bacteria, chlorine and algae removal in primary water and industrial treatment. ERA 9500 removes or reduces iron and hydrogen sulfide from municipal or other water supplies. It also controls scale, bacteria and algae. The process medium received NSF International