Aquarium equipment -Biochemical sponge filter Highlights generic brand Biochemical sponge filter Description: Biochemical sponge filter, durable to use and easy to replace, suitable for all types of water When the water passes through Through the pores, the sponge traps debris in your tank, leaving the water crystal clear. Effectively improve water quality. By cultivating nitrifying bacteria, you will achieve superior biological filtration in your tank. This interfilter is silent and saves energy. Only requiring an air pump and air hose (sold separately) to operate. These create many tiny bubbles for increased oxygen flow. Betta, fry and other small fish will never be sucked into the filter. Fish friendly, you can be relieved to use it Aquarium inter filter can be used many times, easy to clean specification: Material: sponge+plastic XY-2885 Total height: approx.21.5-35cm/8.47-13.78 inch, Bottom length : approx.13.5cm / 5.31 inch, Sponge + Filter box height: approx.15.5cm / 6.1 inch XY-2883 Total height: approx.21.5-35cm / 8.47-13.78 inch, Bottom length: approx.8.8cm / 3.46 inch, Sponge + Filter housing height: approx.15.5cm / 6.1 inch XY-2882 Total height: approx.19-29.5cm / 7.48-11.62 inch, Bottom length: approx.11.3cm / 4.45 inch, Sponge + Filter housing height: approx.12cm / 4.72 inch XY-2881 Total height: approx.19-29.5cm / 7.48-11.62 inch, Bottom length: approx.7.5cm / 2.95 inch, Sponge + Filter housing height: approx .12cm/4.72 inch XY-2880 Total height: about 15.5-22cm/6.1-8.66inch, bottom length: about 14.5cm/5.71inch, height of sponge+pad filter housing: about 10.5 cm / 4.13 inch Package includes: 1 piece aquarium filter Note: Before using the filter, soak it in aquarium water for 5 minutes. Use aquarium water to wash the filter sponge, DO NOT use hot water Since the size above is measured by hand, the size of the actual item might be slightly different from the size shown. -above. Due to lighting effects, monitor settings etc. There could be a slight difference in the color tone of the pictures and the actual item