Eheim GmbH & Co. KG is a German company founed by Gunther Eheim, operating in the domain of aquariums and aquarium accessories. It manufactures different kinds of filters (internal and external) and the associated filter media, pumps, accessories such as autofeeders and gravel cleaners and garden ponds, while its subsidiaries MP (Mueller and Pfleger) manufactures aquariums and Jäger, aquarium heaters.