This smartpond submersible pump, the heart of your pond system, is perfect for circulating water in ponds up to 400 gallons. With its powerful and efficient design, it can move 420 gallons per hour, ensuring constant water movement in your feature. This pump also includes an adjustable flow control feature, allowing you to manually regulate the water flow. Not just for ponds, this versatile pump can be used to create custom water features or power hydroponics systems and it connects easily with ¾ inch ID tubing (adapter included). For ease of placement in your yard, this pump comes with a 16 ft. power cord. These durable pumps are designed to save on energy costs while operating quietly, letting you enjoy the sights and sounds of your water feature without interruption. This pump is built to last and to back this up, smartpond offers a 3-year manufacturer's warranty (2+1 with online registration).