The Nicrew Slim Aquarium Filter is a great filter option for nano tanks. Designed to be used for tanks up to 5 gallons (20L), this filter is beginner-friendly and cost-effective. It features a compact and slim shape that is ideal for hobbyists with limited space. 3-in-1 filter cartridge provides mechanical, chemical and biological aquarium filtration for superior water quality while unique waterfall design enables filtered water to return to the tank silently, gently breaking the surface tension and creating beneficial oxygenation. So it is ultra quiet and won't disturb the fauna. If power is interrupted and restored, its priming system permits restart automatically. The filter also comes equipped with a flow control valve so you can adjust the water flow according to your aquarium needs. Installation and maintenance are quick and convenient, making this filter an ideal setup for freshwater or saltwater aquariums. Slim and compact design, hardly noticeable on the tank, great choice for nano and pico tanks up to 5 gallons. Quiet operation with adjustable flow, doesn't overly disturb the fauna, perfect for shrimp or betta. Patent pending priming system, auto restart if power is interrupted and restored. Comes with everything you need right out of the box for easy setup and use. What's included: Filter body, intake tube, extension tube, intake sponge, and filter cartridge.