The Aquael Powerhead 500 is designed for water circulation and oxygenation. Aquael Aquarium Circulation pump can be used for powering bio and undegravel filters too. Aquael Powerhead is equipped with water flowadjustment, air flow adjustment and 120 degrees adjustable output. Small size but high efficiency. Product features: Wattage: 4.5 W Max flow rate: 500 l/h Max height of pumping: 70 cm The Aquael Powerhead 1000 is designed for water circulation and oxygenation. Aquael Aquarium Circulation pump can be used for powering bio and undegravel filters too. Aquael Powerhead is equipped with water flowadjustment, air flow adjustment and 120 degrees adjustable output. Small size but high efficiency. Product features: Wattage: 10 W Max flow rate: 1000 l/h Max height of pumping: 90 cm The Aquael Powerhead 1500 is designed for water circulation and oxygenation. Aquael Aquarium Circulation pump can be used for powering bio and undegravel filters too. Aquael Powerhead is equipped with water flowadjustment, air flow adjustment and 120 degrees adjustable output. Small size but high efficiency. Product features: Wattage: 15 W Max flow rate: 1500 l/h Max height of pumping: 90 cm The Aquael Powerhead 2000 is designed for water circulation and oxygenation. Aquael Aquarium Circulation pump can be used for powering bio and undegravel filters too. Aquael Powerhead is equipped with water flowadjustment, air flow adjustment and 120 degrees adjustable output. Small size but high efficiency. Product features: Wattage: 27 W Max flow rate: 2000 l/h Max height of pumping: 190 cm