Air 400 Eheim pump One amazing success story has been the EHEIM air. Because we were able to create a very quiet working device with this pump. And many fishkeepers have been waiting for that very thing. The smallest model has a single pump outlet, while the two larger models each have two independently adjustable air outlets. The three models have pump outlets that range from 100 to 200 (2 x 100) l/h. Additionally, one or two EHEIM diffusors are included with them. Every diffusor and pump outlet has the ability to control air flow. This enables you to customize the bubble effect to your liking. Additionally, vibration-resistant rubber soles help to