Abstract: A flow pump includes a housing and an impeller. The housing has a suction port, a discharge port, and an inner housing which forms a flow channel. The impeller is arranged in the flow channel to be open on at least one side. The impeller has rotor blades and rotates about a drive axis. The suction port has a front side which faces the impeller. The front side has a circumferential protrusion. Each rotor blade of the impeller has an edge which faces the suction port. Each edge has a height offset over a length of the edge which corresponds to the circumferential protrusion.

Abstract: A stand for a vivarium has a side wall with a cutout and at least one first magnet closure element arranged adjacent to the cutout. At least one cover is provided that is to be inserted into the cutout and at least partially covers the cutout in an installed position of the at least one cover in the cutout. The at least one cover has at least one second magnet closure element that in the installed position is arranged so as to correspond with the at least one first magnet closure element so that the at least one cover is secured in the cutout exclusively by magnetic forces interacting between the at least one first magnet closure element and the at least one second magnet closure element in the installed position.

Abstract: A component of a water feature for generating an illuminated water image is provided with a housing and an illumination unit fixedly arranged in the housing. A water channel passes through the housing and has at least in sections thereof a round cross section. At least one projection is arranged in at least one length section of the water channel, wherein the at least one projection projects toward a longitudinal center axis of the water channel. The at least one projection forms a part of a nozzle receptacle. The water channel in the at least one length section where the at least one projection is provided has at least in sections thereof no round cross section. A water feature provided with the component is provided with a plug-in nozzle insert inserted from below into the component or an insertable nozzle insert inserted from above into the component.

Abstract: The present invention relates to a method of removing a uranium source from a water, a kit for removing a uranium source from a water, and a use of a powder comprising (i) an alkaline earth carbonate, (ii) an alkaline earth compound chosen from a chloride and/or a nitrate compound, (iii) at least one alkali metal hydrogen carbonate, and optionally (iv) an alkali metal carbonate in a method of removing a uranium source from a water.

Abstract: A water feature for generating an illuminated water image has a housing and an illumination unit fixedly arranged in the housing. A water channel passes through the housing. A nozzle insert is disposed in the water channel and is designed to create a water image. The nozzle insert is supported so as to be pivotable relative to the illumination unit. The nozzle insert is supported so as to be pivotable about a pivot point, wherein the pivot point is positioned at a same level with or below a light-emitting top side of the housing. An alignment and fixation tool is provided that has first contact elements designed to engage second contact elements of a securing element that secures the nozzle insert so that the securing element can be released or fixed by rotation of the tool.

Abstract: Provided are fish food compositions that include 40-70 wt. % cereal flour, 15-30 wt. % meal from aquatic animals, 10-20 wt. % extraction meal, 0.01-0.40 wt. % pepper, and 0.1-1.0 wt. % free methionine. Also provided are methods for using the fish food compositions as a fish food for ornamental fish.

Abstract: The invention relates to a filter unit (1, 19), having: at least one warp-knitted spacer (3) which comprises a first and a second cover layer (4; 5) having in each case a multiplicity of openings (6) which are delimited by peripheral regions (7), wherein threads (8) extend from the peripheral regions (7) of the first cover layer (4) to peripheral regions (7) of the second cover layer (5), and wherein the at least one warp-knitted spacer is rolled, twisted, and/or at least in one portion is compressed.

Abstract: A fountain attachment for water effects has an exterior pipe and an interior pipe disposed inside the exterior pipe. An adjustable nozzle of the fountain attachment has a slot size that can be adjusted by a coaxial displacement of the exterior pipe relative to the interior pipe. At least one guide ball is movably arranged between the exterior pipe and the interior pipe and pretensioned by at least one spring. The guide ball interacts with a guide contour for the coaxial displacement by a rotation of the exterior pipe and the interior pipe relative to each other. A pressure element is arranged between the spring and the guide ball.

Abstract: A pump is provided with an electric motor that has a rotor. The rotor is provided with a shaft and a magnet surrounds the shaft. The magnet is connected with form fit to the shaft. A follower surrounds the shaft at least in some areas of the shaft. The follower is monolithically connected to the shaft or is connected with form fit to the shaft. The magnet is made of at least two magnet segments and the follower has projections which engage intermediate spaces formed between the magnet segments.

Abstract: A water pump has a check valve with a valve body movable in a direction of a valve axis of the check valve between an open position of the check valve and a closed position of the check valve. An actuating device is connected with the check valve and has an operating element that is movable coaxially to the valve axis. The operating element is operatively connected to the valve body and arranged such that the operating element, by applying a coaxial force to the valve body, transfers the valve body into a venting position of the check valve.