Sera Crystal Clear Professional 12 pcs

Sera Crystal Clear Professional is a high performance filter medium for fine mechanical filtration. The innovative patented 3D fibre structure of very quickly removes even smallest particles above 10 Am (such as floating algae or sludge). Can be used in many different types of filters, including the excellent Sera PrefiX pre-filter. Contains 12 pieces, we recommend using 1 piece per 30L of aquarium water.