NPX Bioplastics granular media made from biodegradable polymers; For use in a fluidized reactor; The slow release of organic food from these plastics promotes the development of bacteria that assimilate nitrate and phosphate; These bacteria can be harvested by protein skimmers, so that the nitrate and phosphate levels are naturally reduced; The bacteria are also a food source for filter-feeding invertebrates such as corals, clams, sponges, and feather dusters