Powerful, particularly energy-efficient, and maintenance-friendly pond pump with integrated suction regulation for large flow rates with low energy consumption. The open-flow impeller for dirty water with particle sizes up to 6 mm makes the stable pump resistant to clogging and allows for filterless operation. The ceramic shaft and bearings ensure very low wear and quiet continuous operation. Overload protection is provided by a thermal switch, and maintenance is easy and tool-free. With a hose connection piece that can be mounted as an alternative to the flow rate regulator, this pump can also be installed dry (outside the pond).