Ice preventer and water feature in one device. The pump moves warmer deep water to the surface and keeps a small area ice-free. This allows harmful gases to escape and oxygen to enter the pond. With the nozzle attachment an attractive water feature is created in summer. The surface movement carries in oxygen which is essential for survival. Down to -20°C an ice-free area is created around the floating body. Energy-efficient pump technology without additional heating element (requires depth of at least 80 cm).