sera filter wool
For mechanical prefiltration of fine dirt particles
sera filter wool for the mechanical prefiltration consists of stable fibers that retain finer dirt particles for a longer time without sticking or collapsing. sera filter wool can be washed out several times. Suitable for all filters.

This special synthetic fibre remains soft for long, ensuring an
excellent mechanical fi ltration. Filterwatte can be placed in
the fi lter, either just at the water inlet, as it retains the coarse
impurities (dead leaves, food residue) or at the water outlet,
because it prevents fl aked off parts of fi lter material, from
entering the aquarium, thus ensuring perfect cleaning.