Aquarium compressors Tetra APS Very quiet and reliable compressors. extremely low noise level due to noise-reducing chambers innovative design, sealed housing walls, vibration-reducing rubber mounts high level of quality and reliability uniform air supply due to a powerful and durable membrane If you want to position the compressor below the water level, it is recommended to install a check valve between the compressor and the sprayer . This design will prevent the back flow of water from the aquarium to the compressor in the event of a power outage. Power: 3.1 W Productivity: 150 l / h For an aquarium: 80-150 liters Included: faucet Manufacturer: Tetra, Germany