The HYDROS DC Micro Pump is powerful despite its small size. The pump measures 1.6 L x 1.062 W x 1.45 H. The pump has a maximum head pressure of 8. The flow rate of the pump is 74 gallons per hour. This 12V brushless pump draws a maximum of 4.5W and has an average life expectancy of 30,000 hours (over 3 years). When connected to a Drive Port on the HYDROS Control 2 or Control 4, the controller will supply power to the pump so no additional cords or power bricks are required for operation. Using a HYDROS aquarium controller for your auto top-off system is not only a reliable solution but it also helps clear wire clutter in and around your aquarium.