Julian Sprung’s chemical filter medium made of special sizing of HydroCarbon and PhosBan. Developed to adsorb dissolved organic substances, phosphate, and silicate in freshwater or saltwater and packaged in a convenient fine mesh media bag. HydroClear-XP is simple to install in hang-on-the-back power filters, canister filters, or in flow-through sections of sump filters. HydroClear-XP has a high capacity to adsorb dissolved organic matter and phosphate that accumulate in closed system aquariums, helping to preserve the nutrient-poor original condition of the water, and reducing the maintenance required.