VILLNO Mini Biochemical Sponge Aquarium Filter, Silent Fish Tank Internal Filter

Compact Filter: 7.5*7.5*7cm, equipped with a retractable water outlet with the height range of 10-16cm and a 1m air tube, needs to be used with an air pump. (Air pump is not included in the package.) 3-Stage Filtration: white filter cotton, black sponge and natural stone can achieve physical filtration and biological filtration, make the water in tank cleaner and clearer. Natural stone at the bottom can not only increase the weight to enhance stability, but also help to break down the excrement of fish & provide additional biological filtration surface area. Quiet Aeration: By using an air pump (Air Pump Is Not Included) to drive the filter to operate, produce a steady stream of air bubbles, significantly enhancing oxygen circulation to achieve filtration and oxygenation at the same time and create a quieter and more comfortable environment for the fish. Easy to install & clean: Connect the filter to the air pump with the attached air tube. This way, the bubbles generated by the air pump during operation can drive the filter to work, achieving high efficiency and saving electricity. The filter material can be reused after regular cleaning. Please use the aquarium water only to clean the filter material. Adjustable Water Outlet: The height of the filter can be adjusted within the range of 10-16cm, and the outlet direction can also be rotated 360°, suitable for up to 30L small fish tanks, betta, breeding, shrimp, fry tanks.