Aquascape®️ AquaSurge® 45009 2000-4000 Adjustable Flow Pond Pump. The Aquascape AquaSurge® 2000-4000 Adjustable Flow Pond Pump is an energy-efficient, asynchronous, submersible pump made for continuous use in ponds, Pondless® Waterfalls, and other water feature applications. Asynchronous motor technology provides superior reliability, maximizes longevity, and reduced maintenance with a maximum flow rate of 3,947 gallons per hour. The included Smart Control Receiver includes an integrated control panel and makes it easy to control your pump with the Aquascape Smart Control App, including flow adjustment and customized scheduling. An optional Universal Remote for Adjustable Flow Pumps (Item #45041) is available separately to allow wireless control without the use of a smartphone or tablet. The pump can be operated horizontally or vertically, and a variety of fittings is included for simple installation, including a rotational ball output that allows the discharge position to be easily adjusted. The pump is also backed by a limited 3-year warranty, ensuring years of reliable use.