The fully submersible and oil-free wave maker will revitalized your aquarium and to eliminate dead spots. Improve oxygenation as well as to let your fishes, corals and other aquatics enjoy a vital and energetic ocean-like circumstance. No more debris settling on the bottom or in the corners of the tank. No annoying noise or other side effects to the fishes, the corals and other aquatics. With articulating ball joint, this allows a full 360 degree rotation to generate waves of water movement.