KW Zone Dophin Hanging Filter[Model - FDH800]

Mechanical and biological filtration in one system Filter cartedge can be changed and displayed in one whole piece. Easy setup, easy maintenance and effective performance Perfect for fresh and marine tank. It is a mechanical and bilogical filtering system Special carbon cartidge to purify water, remove odor and offer housing compartment for the biological bacteria Bio Cartridge enhances biological filtration and guaranties optimum colonization of nitrifying bacteria Easy to use, fill up water and plug on. Easy to maintain. Every 2 months replace a new carbon cartridge to achieve best result.