The 3 capacities 100 l - 200 l - 400 l are extremely suitable for the common aquarium sizes. The capacity is almost silent and is adjustable in all three models. 1 x with the smallest model, 2 x with the medium and the large air pump. The larger models can therefore be controlled separately. All three models are delivered complete. That means: incl. air hose and Eheim outlet. The 200 l and 400 l models have two outlets, the 100 l air pump has an outlet. The supplied Eheim outflow nozzle is also adjustable. As a result, the outflow bubbles can be easily adjusted in the aquarium as desired. The Eheim air pump is equipped with a wall mount, but can also be placed on the vibration-inhibiting rubber feet. This prevents the pump from "walking".