For the mechanical pre-filtration of finer dirt particles, sera filter wool is made from stable fibers that retain finer dirt particles over an extended period without clogging or collapsing. Sera filter wool can be washed multiple times and is suitable for all filters.

For biological filtration, we recommend sera siporax Professional. Sera siporax Professional is open-pored and three-dimensional, allowing for permanent pollutant degradation. It is necessary to rinse sera filter media with warm water before first use.