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 up to 6 mm grain size 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).