The Rio 50 is a compact, lightweight fountain or aquarium submersible pump. 2.2" x 1.4" x 1.8" size allows the Rio 50 to be used just about anywhere. The Rio 50 pumps 69 gallon per hour. Sealed, internal housing provides quiet operation. May be used in fresh or salt water. Adjustable valve for variable flow rates. Includes: under gravel filter, under gravel filter adapter, discharge adapter with venturi jet, discharge adapter with venturi jet and flow control, suction cups, air stopper, elbow and 6 ft power cord. Comes with six month warranty and care instructions. It is perfect for smaller watercraft projects since it is so small and powerful. The Rio pumps deliver high performance at an affordable price.The energy efficient, low heat operation is reliable, quiet, and long lasting. The Rio pumps are fully submersible and can be used with wet-dry filters, venturi protein skimmers, under gravel filtering systems, ponds and fountains in both fresh and salt water.