Sponge Breeding Fry Shrimp Aquarium Fish Tank Filter Features: 1.Sponge filters provide both mechanical and biological filtration 2.Simply install an air line into the unit and provide both aeration and filtration for your fish. 3.Aerobic bacteria colonize the sponge providing a bacterial substance to facilitate the nitrogen cycle. 4.In addition, the sponge traps larger waste particles mechanically cleaning the water without trapping baby fish 5.They are useful for as breeding filter or as secondary filter. Or they can be used as pre-filtration unit by fitting to an external or a top filter. 6.The bio-sponge filters are designed and constructed with quality materials that will outlast any other sponge filters on the market 7.The sponge is designed and constructed with the multilayer principle and the largest surface area possible with no clogging 8.The sponge material is easy to clean 9.Quiet operation 10.The air diffusion chamber produces minute and large num ber of air bubbies which increase the oxygen solubility in the water 11.They are useful for as breeding filter or as secondary filter. Or they can be used as pre-filtration unit by fitting to an external or a top filter Description: Name: Sponge Breeding Aquarium Shrimp Fry Fish Tank Filter Color: Black Quantity: 1 Pcs Specification: Product dimension: 9L x 4.8W x 13Hcm Sponge dimension: 4.8D x 6Hcm Package Include: 1 x Shrimp Fry Tank Filter Note: 1.Du e to the light and screen difference, the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid. 2. Please allow 1-5mm differences due to manual measurement.