Lifegard Aquatics All-in-One Pond Equipment for Easy Clean, Double 2-Stage High Capacity Mechanical Filtration (2 types of sponges) to remove solids Quiet, Efficient QUIET-ONE PUMP with 20 power cord 13 Watt Ultraviolet Sterilizer with separate 20 cord to be used only as needed UV Light Indicator to notice if bulb is operating Biological Filter for Bacteria Growth