A pond pump moves water around your pond and is vital if you want to keep it healthy and clean. Pond pumps help to prevent the water in your pond becoming stagnant (which results in the growth of algae). As the pump circulates the water within your pond, oxygen is drawn into the water helping to create a healthy environment for your pond plants and fish. You can also use a pump within your pond to power a water feature – such as a fountain, pond ornament or waterfall.