Abstract: A device for irradiating media with UV light has a housing which contains at least one tubular body composed of UV-permeable material and through which medium flows, and at least one UV light source disposed at a distance from the tubular body and approximately parallel thereto, and to which a reflector is assigned. A reflector is likewise assigned to the at least one tubular body, which is disposed opposite the reflector of the UV light source and is open toward same.

Abstract: An outside filter for an aquarium has a housing having an inner chamber, a removable cover for closing the inner chamber of the housing, a supply conduit for supplying water to be filtered into the inner chamber of the housing, a withdrawal conduit for withdrawing the water from the inner chamber of the housing, a motor-operated pump for withdrawing the filtered water, a device for producing a vacuum for aspirating water with air which is contained in the supply conduit during a displacement, the inner chamber of the housing together with the discharge conduit forming a system which communicates with the supply conduit and during the production of the vacuum is hermetically sealingly closed from outside and serves as an evacuatable pressure chamber, the device for producing the vacuum inside the system which is closed.

Abstract: A filter for aquarium operating in accordance with the lifting-lowering principle comprises a housing with at least one filter compartment for a filter material, a pump which aspirates water after passing through the filter compartment through a suction conduit and supplies the water back into an aquarium, at least one auxiliary chamber supplied with water and a float-controlled valve device controlling an outlet of the auxiliary chamber and communicating with the suction conduit, an auxiliary housing in which the auxiliary chamber is provided and supplied with water filtered after passing of the filter compartment in accordance with the principle of communicating pipes. A passage which is connected with the suction conduit has a valve opening which is alternatingly closeable and openable by a float-controlled valve closing member of the valve device.

Abstract: The covering device for an aquarium, terrarium or like vivarium for living things includes an approximately rectangular frame (13); an upwardly openable cover member (15) pivotally mounted on the frame; a lighting device (17) mounted on the bottom side (16) of the cover member (15); a device for locking and releasing the cover member (15) when it is in a closed position on the frame (13) and a drive mechanism (18) for pivoting the cover member (15) upward automatically automatically to open it when the cover member (15) is released by the locking and releasing device, at least over a predetermined initial pivot angle range. A brake device for braking the action of the drive mechanism can also be provided.

Abstract: An inner filter for an aquarium has means forming a pump chamber, a filter chamber, a suction opening, and outlet opening, a suction passage which communicates with the pump chamber and the filter chamber and in which water is aspirated through the suction opening, a pressure chamber which communicates with the pump chamber and the outlet opening, a pump wheel, an electric motor having a rotor which drives the pump wheel in the pump chamber and also having a stator and a housing having three releasable and again assembleable segments, the segments including a first segment which accommodates the stator with an electric conductor, a second segment which accommodates the rotor with a bearing axles and bearings and also accommodates the pump wheel, the pump chamber, the filter chamber, the suction passage and the pressure passage, and a third segment which is placeable on the second segment and formed as a cover and has the outlet opening connectable with the pressure passage, the suction opening which is connec