External Aquarium Filter, Hang On Back 250L/H 5-in-1 USB Fish Tank Filter with Adjustable Flow, Bio-Filtration/Oxygenation, Energy Efficient Quiet Waterfall, for Small

【5-in-1 Multifunctional Filtration】This small fish tank filter features a hang on back filter aquarium design, combining debris filtration, oxygen aeration, beneficial bacteria cultivation, silent operation and low energy consumption – an all-in-one solution for small tank water quality. 【High Flow Rate & Ultra-Low Energy Use】Its compact size (6.5×6.5×15cm), Suitable for glass tanks with a thickness of 3 mm or 5 mm. As an external fish tank filter, it delivers 250L/h circulation for 10-30L tanks, consuming less per day. An energy-saving and powerful small fish tank filter for daily use. 【Adjustable Flow for Different Fish Species】Knob-controlled precision adjusts water flow intensity – suitable for bettas, guppies and more, preventing shock to small fish. This hang on back filter gives you full control over filtration strength. 【Tool-Free Cleaning & USB Easy Installation】Snap-on assembly, filter parts can be removed separately for cleaning without any tools. It is extremely easy to set up—simply fill it with water, plug it in via the USB port, and it’s ready to use straight away, making life easier for fishkeepers. 【Ultra-Quiet Operation】Built-in brushless motor + shock-absorbing structure keeps noise below 30dB – quiet enough for bedrooms and offices. The ideal hang on back filter aquarium and external fish tank filter for peaceful environments.