wikipedia), in the beginning the factory built bus models, but in 1963 Gunther invented and put into production the first external filter controlled by a seal pump. Since then the activity of Eheim has been growing and it's also established in the field of medical and scientific where Eheim pumps [...]
Let's start with this article to speak about the numbers resulting from our tests, following the introduction that you can read here: [...]
The project of the return pumps is now old and started with the previous article [...]
