Relax and enjoy your fountain both day and night with our TotalPond 400 GPH Low Water Shut-Off Fountain Pump with Light. We recommend this pump for medium to large fountains that are located in windy, arid or hot areas. It's also an excellent pump if you sometimes leave your pump running while you're away. Fountain pumps fail when water levels drop. This medium-sized pump features our patented Low Water Shut-Off smart Technology that automatically senses when the water level drops. Once water is added, the pump will turn itself back on. This quiet energy efficient pump can produce fountain heights up to 7 ft. high with an adjustable water flow control.