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Specifications: Sponge filter provides both mechanical and biological filtration. Aerobic bacteria colonize the sponge, providing a bacterial substrate to facilitate the nitrogen cycle. In addition, the sponge traps larger waste particles, mechanically cleaning the water. There are three filter system: filter cotton, quartz sand, activated carbon. Supply the water with much needed oxygen. Reduce noise from air pump and consume lowest wattage. Multi-layer media, easy to move and clean. Easy-to use biological filter for tropical aquarium fish. Type: Fish Tank Sponge Filter Material: Acrylic Plastic Fit for: 10 - 60cm Fish Tank Features: Elegant Appearance, Economical, Functional Dimension: 7.5cm x 7.5cm x 8.0cm/2.95" x 2.95" x 3.15" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Fish Tank Sponge Filter #Oxygenpump #Waterfilter #Fishtankfilter #Filter #Tank #Durable #Sponges #Pump #Home&Garden #Fishing