Description 6.25 Inch x 6 Inch (16cm Tall x 15cm Diameter), Bio Sponge Bio Filter operated by a airpump will mechanically clean & biologically filter a aquarium. Bio Sponge Filters are a easy way to clean an aquarium, massive surface area allow bacteria to colonize and the sponge acts as a mechanical filter, just uses air to operate, so needs an air pump to operate. Weighted base and uplift tube included. Tip – When cleaning use the aquarium water to not kill off the friendly bacteria.
