Nano Micron, internal filter for aquariums up to 50 litres of capacity. Nano Micron is provided with a floating rotor system, complete with a device that avoids the part to wear out and with an exclusive water flow control system, to allow you to adjust the filtering depending on the volume of water in the aquarium. With its high-adherence suction cups, Nano Micron is ready for wall fitting of your aquarium or terrarium. The filtering action is carried out by sponge filter which ensures perfectly clean water for at least thirty days.