Protein skimmers are the heart of marine water aquarium filtration.They remove protein that is permanently released into the water by micro organisms, invertebrates and fish. The powerful and economic skimmers remove particles and floating matter,and they aerate the aquarium.The space-saving sera marin Protein Skimmer PS 200 ideal for nano aquariums up to 200 liters. It contains an energy saving dispersion pump integrated in the casing of the unit that by itself draws in air and blends it with aquarium water.It can easily be attached to the inside of the aquarium by a holder bracket adjustable in height. Air and water flow are easy to adjust.Energy consumption: 8 W