Aquarium with external filter barrel High efficiency water purification / Silent energy saving / multilayer filtration Circulating water purification, saving D energy and energy saving, silent filtration, multilayer filtration, sealed and watertight materials, environmentally friendly Quick water purification by layer layer filter, integrated multilayer filter cotton, materials Filtering can be added to improve the filtering effect and effectively purify the water “Core” sleeps quietly and naturally High resistant shaft core resistant, Special noise reduction design, micro-motor, with permanent magnet rotor, noise reduction and noise reduction The environmental protection materials are safe and secure, high ABS technical plastics quality are ecological, wear-resistant and more durable po Integrated circulation water mpe, autonomous traffic water pump, no need to buy an extra water pump (only serial-powered water pump) the adjustable flow valve, the Design of the water inlet switching