In- Package Includes: As shown in the picture of the options The advantages of this built-in filter: 1. Low decibel, very quiet. 2. Multiple filtration and efficient cultivation of nitrifying bacteria. 3. Efficient oation to increase the o content of water. 4. Strong flow promotes water circulation inside the fish tank. 5. Simulate rain to enhance aesthetics while promoting oation. Three specifications We offer three different specifications, and you can choose according to the size of your fish tank. For a super large fish tank, you can equip it with two filters, one on the left and one on the right, for better results! Two versions of plugs EU plug region: Korea , Russia , Peru , Brazil . EU countries such as Germany , France , Netherlands , Denmark , Finland , Norway , Poland , Portugal , Austria , Belgium , Hungary , Spain , Sweden , etc. Note:Buyers from Australia and New Zealand can choose this version of the plug and use it with the plug adapter. If you do not have a plug adapter, please note that you need a plug adapter when placing your order, and we can give you a free plug adapter. US plug region: Countries such as the United States , Canada , Japan , Brazil , the Philippines , Thailand , etc. Multi layerfiltration The filter is equipped with a double-layer filter box and built-in biochemical filter cotton, which effectively completes physical and biochemical filtration. Biological filtration Large capacity filter box equipped with biochemical filter cotton for efficient cultivation and digestion of bacteria. It can also be filled with other biochemical filter materials such as quartz balls for better filtration efficiency. High efficiency oation The filter is equipped with an oation outlet, which can efficiently oate while filtering. The gas volume can be adjusted to increase the o content of the water and make fish breathe more smoothly. Rain shower flow design The water outlet adopts a rain shower design, which can rotate 360 degrees, not only increasing the viewing experience, but also increasing the o content in the water again. Pumping and water exchange Pump and change water, one machine can handle it. Place the filter at the bottom of the fish tank and connect the water outlet to the water pipe to draw water. Imitation of natural ecological wave-making The filter has strong power and can achieve the function of preventing natural ecological waves, promoting the circulation of water in the tank, and making fish more active. Silent Operation When using a noise reducing water pump, when the outlet is underwater, it comes with built-in noise reduction for quieter filtration. Strong power Adopting high-strength wear-resistant rotors, resistant to acid, alkali, and corrosion, suitable for use in fresh water and seawater, with a longer service life. Installation diagram 1. Install a universal water outlet that can be used for filtering water or pumping water for exchange. 2. Install an oation outlet and connect an oation pipe for efficient oation while filtering. 3. Install a rain shower type outlet to simulate natural rain, enhance aesthetics, and increase o levels. Multiple options for you to choose from Regular style Water Outlet x1 Oating Water Outlet x1 Ddjustable Oating Tube x1 Built-in Biochemical Cotton x2 Rain showerstyle Rain Shower Pipe x1 Water Outlet x1 Oating Water Outlet x1 Ddjustable Oating Tube x1 Built-in Biochemical Cotton x2 Rain showerstyle (+ BiochemicalCotton For Replcaement) Rain Shower Pipe x1 Water Outlet x1 Oating Water Outlet x1 Ddjustable Oating Tube x1 Built-in Biochemical Cotton x2 BiochemicalCotton For Replcaement x2, used for replacement with built-in filter cotton! Rain showerstyle (+Hollow QuartzBiochemical filter Ball Rain Shower Pipe x1 Water Outlet x1 Oating Water Outlet x1 Ddjustable Oating Tube x1 Built-in Biochemical Cotton x2 Hollow QuartzBiochemical filter Ballx1 (Can fill a filter box),Better biochemical filtration effect!