Water Outlet Decoration For Aquarium: No Power Supply Needed, Just Connect To The Water Outlet, The Water Flow Can Drive The Fan Blades - Stir The Still Water Body, Create Natural Turbulence, And Increase Oxygen, One-Key Solution For Circulation And Oxygen Issues. Compatible With Common Interfaces, Plug And Play, Low-Cost Way To Make The Aquarium Water "Alive" And Make Fish Keeping Easier And More Worry-Free.