After a while, but then came the surprise: the pump has stopped overnight air to pump although it is still running audibly.
Screwed, since bought by the retailer and receipt relocated -> no longer a guarantee, and lo and behold: the most stressed part of which is constantly in motion, thin and made of brittle plastic. A predetermined breaking point. This pump is built to break down after the foreseeable future.
And the company Eheim plays it safe: Do not just this small part is broken, and the holder of the magnet attached to the same brittle plastic bracket is already broken. So it would only be a matter of time until the pump and thereby gone irreparably broken and would be unusable.
For this insolence, there is of me 1 star. A device that animals should keep up with the life, deliberately to build so that it breaks, thereby risking the lives of these animals, is an absurdity.