EHEIM aqua is a comfortable internal filter for small and medium-sized aquariums. Also ideal for beginners. It simply attaches to the corner of the aquarium using suction cups. It takes up very little space, leaving you more room to design your aquarium. The powerful pump and large suction surface ensure efficiency. You can adjust the power continuously and thus determine the water flow and surface movement. In addition, a diffuser enriches the water with oxygen. The key feature, however, is the modular construction: the filter containers can be easily removed for cleaning. And if you want to expand the filter, you can extend it with additional modules.