Sera spare sponge for F 1200 varaosa

A replacement sponge for the sera F 1200 internal filter, one piece.

What it fits: the largest model of the range, the F 1200. The smaller F 400 and F 700 have a smaller sponge of their own, and the two are not interchangeable.

Why the sponge is the most important part of the filter: it handles both the mechanical and the biological filtration. Coarse dirt stays on its surface, and nitrifying bacteria settle in its pores and break down ammonium and nitrite.

In use: rinse the sponge in aquarium water, not under the tap – chlorine kills the bacteria and the biological side of the filtration starts over. Replace it only when it no longer springs back after being squeezed, or when it has torn.