... lights, Filter 2,different delivery heads 3,adjustable flow controller aquarium pump HL-4501,with finger light, ... lights, Filter 2,different delivery heads 3,adjustable flow controller Model HL-450 / HL-450LVFlow rate 450L ... 12V, 24V, 120V, 220-240V Watt 7W Flow control Yes Outlet connection 8mm, 13mm Size 44X58X51 ... outlet to ensure the pump is getting electrical power. 5, Check the pump discharge and ...