Aquarium Top Filter. Suitable for Medium size aquarium When using the filter pump, the pump head must be placed in the tank, otherwise the head easy to burn Unique design mode, set the pump, the water cycle and water filtration system in one compact, elegant design Filter configured multi-type biological and chemical filtration system, integrated physical, biological decomposition of a number of new technologies, the most suitable for cultivating good nitrifying bacteria to improve the filtering effect, to keep the water clear and bright translucent