Eheim aqua is a very easy to use internal filter for small to medium sized aquariums. Ideal for beginners, it simply attaches to the corner of the aquarium with suction cups. Due to its compact size, it takes up minimal space and leaves enough room for aquascaping. The powerful pump and large inlet provide efficiency and the outflow can be easily adjusted to control both water flow and surface movement. In addition, a diffuser enriches the water with oxygen. The most important feature, however, is the modular design: the filter containers can be easily removed for cleaning and if you want to increase the filter capacity, you can expand it with additional modules.