Fish Tank Aquarium Pump Air Driven Bio Filter Sponge

This filter uses bubbles of air from an external air pump (sold separately) to draw water through the filter. As water is drawn out through the lift tube, it is replaced by water entering the filter. The top layer of white filter pad provides a mechanical filtration. The black bio-sponge in the 2nd layer and ceramic rings with gravel provide biochemical filtration. They support the colonization of bacteria. The bacteria help to break down harmful waste (ammonia and nitrite).

Includes filter media

Size: 7.5 x 10 x 10cm (adjustable to 15cm)

Air Pump sold separately