Features triple filtering functions namely, mechanical, chemical and biological filtration, which can greatly enhance its filtering effectiveness. Revolutionary bio-falls quad-filtration system make the water flow can be adjusted bey the regulating valve, which increase the needed oxygen content for those creatures in the tank - friendly to the atmosphere: Adopting silent rotor motor, making no noise, thus providing a tranquil and serene environment for you as well as those creature in the tank - transparent chamber: Using transparent box for the filter, it is easy for users to observe the operation movement of the filter, thus also making it easy to maintain - quick & easy installation: This filter is designed to provide comprehensive filtration for today’s modern aquariums, and it’s ready to go right out of the box – setup takes just a few minutes Model: 120: FOR 15-25cm AQUARIUMS, 120L/H 230: FOR 25-36cm AQUARIUMS; POWER 2.5W; F.MAX 230L/H