Key Features Mini aquarium air pump Single outlet Comes with free replacement membrane Suitable for 0-50L tanks 78L/hr flow rate The Superfish Aquarium Air-Flow Mini Air Pump is designed to keep your aquarium oxygen-rich. This particular unit includes one outlet with a flow rate of 78 Litres per Hour. The air pump must be used externally above the tank. Each pump also comes with a free replacement membrane to ensure longer usage. Specifications Suitable for: up to 50 Litre tanks Power: 1.8 Watt Flow Rate: 78 Litres per Hour