Aquatopia Marine Protein Skimmer and Filterhas a flow rate of 500L/H and suits salt water aquariums up to 50 Liters. The unit is in the form of the hang on filter design. It filters, skims off waste and oxygenates water. For salt water aquariums For aquariums up to 50L Flow rate: 500L/H Energy: 6.6W Voltage: 220-240V/50Hz Comes with instructions for use Compact design, easy to operate Ideal primary filter for small saltwater, fish-only aquaria Filters, skims off waste and oxygenates water Unique needle-wheel impeller creates fine air bubbles to enhance skimming Spare parts are available to buy for this filter Made by Aquatopia Includes Filter: The aquarium water is triple-purified as it passes through the Bio cartridge. First it is mechanically filtered by the dense polyester filter material. It then passes through an activated carbon medium that is specially designed to be an effective chemical filter. Finally, the entire cartridge acts as a biological filter. Advanced Venturi-Type Protein Skimmer: This specially designed skimmer reflects the latest technology available. Air is injected into the saltwater creating millions of very fine bubbles. Potentially dangerous compounds and toxins adhere to the surface of the bubbles. This frothy waste continues to accumulate until it pushes its way up into the collection tray.