The Tetra Biological Filter Sponge BF 400/600/700/1200 is a replacement filter medium for the Tetra EX 600-1200 external filters.

For the well-being of your fish and plants, permanent filtering of the aquarium water is necessary. The Tetra EX filter technology safely breaks down excess nutrients and thus ensures permanently good water quality. The filter is the heart of every aquarium and is therefore chosen to fit every biotope. It is not only the size of the basin that is important, but also its inhabitants. At Tetra, all AquaArt complete sets contain the right filter for the fish stock suitable for the respective aquarium. However, if the circumstances change because the fish are multiplying or very small animals such as dwarf shrimp are feeding in, the existing filter may also have to be replaced by a more suitable one. Here Tetra offers a variety of devices that are suitable for all tank residents and aquarium sizes.

The Tetra biological filter sponge is used for pre-filtering in the external filter and retains coarse dirt that could otherwise clog finer filter media. The coarse pores enable useful cleaning bacteria to optimally settle. The filter sponge can be washed out at regular intervals but should be replaced after cleaning twice. The contents of delivery includes 2 pieces.

Oliver Knott recommends:

With the Tetra biological filter sponge, filter media can be replaced quickly and easily and thus guarantee optimal water quality and crystal-clear water!