Based on this video :

https://www.youtube.com/watch?v=qQ_HfoD6HuM

Abstract

This is a transcript of a YouTube video featuring Tunze circulation pumps. The speaker, Claude Hug, explores the history of aquarium pumps, highlights Tunze innovations, and provides tips for positioning and using pumps in a reef aquarium. He explains the principles of water circulation, the different technologies, and the advantages of Tunze pumps over other brands. He also highlights the importance of optimal circulation for coral health and biological filtration in the aquarium. The video concludes with a presentation of the new Tunze Stream 3 pump, which offers quiet operation and exceptional performance.