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Battery Backup Compatible In an aquarium with no flow, fish and corals begin to die in as little as 4 to 10 hours. The Battery Backup is reef tank insurance in an aluminum housing. By adding the Battery Backup, your tank is insulated from power interruptions, helping protect your valuable investment -and your tank inhabitants. *Hours are estimated and will vary depending on battery life, pump mode, and other factors.   Cost Savings Traditional AC pumps, when used as a return pump for your sump, are flow controlled through the use of a choke valve. This method of control is inherently inefficient for two reasons. 1) The AC pump purchased must often be overpowered for your given setup to allow for flexibility. 2) By adding artificial impedance to your flow, electricity is wasted. The Vectra pump will always operate at the optimum efficiency because there is no need to use a flow restricting valve to achieve your desired flow rate.   Specifications

• Max Flow: 2000 GPH
• Max Head Height: 21.5 Feet
• Footprint: 4.5" L x 7.5" W
• Input Fitting*: 1.25" (31.75mm)
• Output Fitting*: 1" (25mm)
• Power Supply: 96W