This is a 800 Aqua One EliteSkim protein skimmer with pump for marine aquariums up to 800 litres. Protein skimmers remove organic waste from your aquarium water. It includes a water pump and air pump that will help to move water as well as create air in your aquarium. About The Aqua One EliteSkim Protein Skimmer EliteSkim 800 For fish tanks up to 800 litres Comes with water pump and air pump Suitable for marine/saltwater aquariums Easy to assemble Max flow rate of 2500 Litres per hour