The Eheim Air 400 delivers reliable aeration for aquariums up to 400 litres, engineered with German precision for consistent performance. This compact air pump features whisper-quiet operation, making it ideal for both display tanks and breeding setups. Built-in vibration dampening reduces noise while maintaining steady air output, ensuring optimal oxygen circulation for fish and beneficial bacteria. The durable diaphragm mechanism provides years of dependable service with minimal maintenance. Perfect for aquarists seeking professional-grade aeration without the bulk.