German-made Tunze powerheads are one of the best high-flow powerheads available. They are smaller and can be hidden in the aquarium easier than competing brands. Tunze pumps can be configured in a wide range of positions to target any area of the tank. Tunze Turbelle Nanostream 6045 -For aquariums from 10-135 gallons -Flow rate: 400-1175 GPH -Manual Flow Adjuster -Energy consumption: 5 to 7W -Energy consumption as tested: 6.7W -Cable length: 78.7"” -Diameter: 2.75" -Output diameter 1.5/.59"