Features: -A Powerful Internal Filter Pump. -Air Volume can be Adjusted. -Absorb Fish Feces. -Large Capacity Filter Box. -New & Modern Design. Model: AQ-500F -One Layer -Watt: 6W -Voltage: 220v-240v -Frequence: 50/60Hz -F.Max: 500L/H -Size: 3.5cm x 4.5cm x 11.5cm AQ-1000F -Two Layer -Watt: 15W -Voltage: 220v-240v -Frequence: 50/60Hz -F.Max : 1000L/H -Size: 5cm x 6cm x 21cm AQ-1500F -Two Layer -Watt: 25W -Voltage: 220v-240v -Frequence: 50/60Hz -F.Max : 1500L/H -Size: 5.5cm x 7cm x 24cm AQ-2000F -Three Layer -Watt: 28W -Voltage: 220v-240v -Frequence: 50/60Hz -F.Max : 1800L/H -Size: 5.5cm x 7cm x 32.5cm