sera crystal clear Professional | Product test with Dieter Untergasser

The innovative high performance filter medium sera crystal clear Professional effectively eliminates cloudiness from 10µm (e.g. floating algae, duff and sludge) in shortest time, due to its new, patented 3D-fiber structure. It can be used in freshwater and marine aquariums as well as in garden ponds and it ensures long-term crystal clear water. The outstanding force in comparison to traditional filter wool: The filter balls are inherently stable and 80 % of them can be reused after washing them out. In this video, our experienced staff member and successful author, Dieter Untergasser, will check out the efficacy of sera crystal clear under extreme conditions. For more information, please visit: www.sera.de