Internal filter for mini aquariums. Suitable for aquarium sizes of 10-40 liters. Powerful, quiet, and compact. Large surface area for filter bacteria. Safe for shrimp and crabs. The nano corner filter is powerful with a pump performance of 150 l/h. The pump operates so quietly that it is practically inaudible. The power consumption is only 2 watts, conserving natural resources. The water flow can be adjusted continuously, and the water stream can be directed in any desired direction thanks to the 90-degree rotatable filter outlet. The filter features a nozzle pipe with an integrated cleaning slider and a mini brush for easy cleaning of the nozzle openings. Due to narrow intake openings and a very fine-pored pre-filter sponge, the nano corner filter is also safe for young shrimp. Cleaning the filter element is very easy: simply grasp the filter at the outlet pipe and pull it forward, then remove the filter element. It is best to wash the filter element in a clean bucket with aquarium water to avoid harming the important filter bacteria.