2-Pack 480GPH Wave Maker Aquarium Circulation Pump Powerhead Submersible

Features: Small profile so it doesn't take up much space in the tank. Articulating ball joint, allows a full 360 degree rotation to generate waves of water movement ensuring that no more debris settling on the bottom or in the corners of the tank. Totally submersible and oil-free motor to avoid pollution to the living circumstance Suction cups with articulating ball joints for versatile directions. Imitate the natural flow to create the similar river environment and greatly increase the dissolved oxygen in water. Easy to install - just suck the cup to the inner wall (must be totally submersed under water), plug in and it works. NOTE: MUST be totally submersed under water and do not use with a timer or a controller. Specifications: Length of power cord: 6ft Voltage: 110V-120V / 60Hz For 480 GPH: Total Flow Rate: 480GPH (1850L/H, each unit) Recommend aquarium size: 30-60 gal freshwater tank, 20-30gal saltwater tank Dimension: 2.75 x 2 x 2 inches (L x W x H)  For 800 GPH: Total Fl