Description: Multifunction: The Fish Stool Suction Collector is 3 in 1 pump as a filtration, oxygenation, and stool collector to maintain your aquarium clean. Fish Stool Suction Collector: The system operates on pneumatic principle, treating liquid in the tank and storing fish waste and impurities in the middle compartment before returning liquid to the tank Practical: The need for regular liquid changes and gravel washing will decrease with Fish Stool Suction Collector. The fish waste is contained, not liquid pollution or foul odors. Easily Use: Simply place the unit inside the aquarium tank and connect pump. When the compartment is full of waste, empty until it has been cleaned before returning it back to the aquarium tank Material: Made of high quality materials, absolutely safe and filter operation is no noise. Great way to clean and oxygenate your tanks. Size Chart: Single S: Suitable for Fish Tank Height: 20cm-30cm/7.87inch-11.81inch, Sponge Diameter: 5cm/1.97inch, Sponge Height: 8cm/3.15inch, Filter Material Height: 4cm/1.57inch, Telescopic Tube Length: 18cm-25cm/7.09inch-9.84inch; Single M: Suitable for Fish Tank Height: 30cm-60cm/11.81-23.62inch, Sponge Diameter: 6cm/2.36inch, Sponge Height: 13cm/5.12inch, Filter Material Height: 4cm/1.57inch, Telescopic Tube Length: 27cm-42cm/10.63-16.54inch; Double Small: Suitable for Fish Tank Height: 25cm-40cm/9.84-15.75inch, Sponge Diameter: 5cm/1.97inch, Sponge Height: 8cm/3.15inch, Filter Height: 4cm/1.57inch, Telescopic Tube Length: 22cm-30cm/8.66-11.81inch; Double M: Suitable for Fish Tank Height: 30cm-60cm/11.81-23.62inch, Sponge Diameter: 6cm/2.36inch, Sponge Height: 13cm/5.12inch, Filter Height: 4cm/1.57inch, Telescopic Tube Length: 27cm-42cm/10.63-16.54inch. Package Includes: 1 Fish Tank Pump Sponge Filter Note: Please allow slightly errors due to manual measurement and different monitors.