Slim HOB Aquarium Filter | Quiet Adjustable Flow Fish Tank

Slim HOB Aquarium Filter – Quiet, Efficient & Easy to Set Up

Keep your fish tank crystal clear with this ultra-slim Hang-On-Back (HOB) Aquarium Filter. Designed with a sleek waterfall-style flow and patent-pending priming system, this compact filter is perfect for nano, pico, and small aquariums up to 5 gallons. Made in Mainland China.

Why You'll Love This Filter

• Ultra-Slim & Compact Design: At just 3.8–5cm thin, this filter sits discreetly on your tank rim — barely noticeable, yet highly effective.
• Whisper-Quiet Operation: Engineered for silent performance so your aquatic environment stays serene — ideal for bedrooms, offices, and living spaces.
• Adjustable Flow Rate: Dial in the perfect water flow for your tank's inhabitants — gentle enough for shrimp and betta fish, yet powerful enough to maintain a clean, healthy aquarium.
• Auto-Restart Technology: Patent-pending priming system automatically restarts the filter if power is interrupted and restored — no manual re-priming needed.
• Power-Saving Performance: Energy-efficient motor keeps running costs low while delivering consistent filtration 24/7.
• Everything Included: Comes ready to install right out of the box — filter body, intake tube, extension tube, intake screen, and filter cartridge all included.

Specifications

• Material: Durable BPA-free plastic
• Color: Black
• Target Species: Fish, Shrimp, Betta
• Available Sizes:
  • Small: 18 × 7 × 3.8 cm (7.09 × 2.76 × 1.50 in)
  • Medium: 26.5 × 13.5 × 4.5 cm (10.43 × 5.31 × 1.77 in)
  • Large: 26.5 × 18.5 × 5 cm (10.43 × 7.28 × 1.97 in)
• Package Includes: 1× Filter body, intake tube, extension tube, intake screen, filter cartridge
• Country of Origin: Made in Mainland China

Perfect For

• Nano and pico tanks up to 5 gallons
• Betta fish, shrimp, and small tropical fish
• Desktop, bedroom, and office aquariums
• Beginners looking for a simple, plug-and-play filtration solution

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Helpful Resources

For more information on responsible aquarium keeping and aquatic animal welfare, visit the U.S. Fish & Wildlife Service.

Frequently Asked Questions

Q: What size aquarium is this HOB filter suitable for?

A: This slim aquarium HOB filter is designed for nano and pico tanks up to 5 gallons. Its compact waterfall design makes it ideal for small desktop or bedroom aquariums housing betta fish, shrimp, and other small freshwater species.

Q: Is the aquarium filter noisy during operation?

A: No — this filter is engineered for whisper-quiet operation. Its silent motor and smooth waterfall flow ensure minimal disturbance to both your fish and your environment, making it perfect for bedrooms and offices.

Q: What happens if the power goes out?

A: Thanks to the patent-pending auto-restart priming system, the filter will automatically restart and resume normal operation once power is restored — no manual intervention required.

Q: Does the filter come with everything needed for setup?

A: Yes! The package includes the filter body, intake tube, extension tube, intake screen, and filter cartridge — everything you need for a complete, out-of-the-box installation.