ISTA Bio-Sponge Filter

Bio-Sponge Filter offers effective mechanical filtration that rids aquarium water of waste products, while adequately oxygenating the water. The foam construction also acts as biological filtration and offers an environment that encourages the colonization of good bacteria. Suitable for use with an air pump or an external filter, the Tzong Bio-Sponge operates silently, and is easy to install and maintain.