Made of high quality ABS, non-toxic, long service life. Large space, effective cultivation of nitrifying bacteria, elimination of astringency and adsorption of impurities. < p>Helps restore the natural water quality and provide your fish with the most suitable living environment. Creates a new appearance and various functions. Filtration multi-stage, multiple protection. Easy to use, easy to clean. Quiet and shocking filtration. Complete range of filtration materials.