Sera Crystal Clear Professional provides an innovative, patented 3D fiber structure that quickly and reably removes particles above 10 µm (such as floating algae or sludge). Due to its structure, it keeps its shape and can be washed out severla times - for lastingly Crystal clear water. They are 80% reusable after washing out.
- bhumish g. wrote about Sera Crystal Clear Professional in 2017:
I am a big fan of Sera, I have been using Fill 60, Fill 120 filter model recently I took Sera Crystal Clear Professional and I am very happy as I am using it in my sump- Filteration :my 5feet Tank and i have crystal clear water.
I am very happy.