The NSF International-certified Ecoflo Coco Filter from Premier Tech Aqua is designed to protect ecosystems using a natural coco-husk-fragment-based filtering media that biologically treats pollutants and acts as a barrier to retain solids. The natural organic filtering media allows for recycling of the spent filtering media to produce renewable energy or compost for soil amendment. It offers a large, compact filtering media surface and uses no energy to treat wastewater. According to the manufacturer, the filtering media is capable of sustaining a 40 percent increase of treatment capacity. 800/632-6356; www.premiertechaqua.com.