Hydor Koralia Nano Aquarium Circulation Pump 240 GPH - Compact Power

In this review the Hydor Koralia Nano 240 is evaluated for nano and small reef tanks where reliable circulation and low energy use matter most. The bottom line: this compact wavemaker delivers strong, quiet flow in a tiny 2.4 in body and uses little power, making it a practical choice for freshwater tanks from about 16 to 28 gallons and smaller saltwater setups from 10 to 15 gallons. The reviewer found it easy to position with the improved vibration absorbing magnet and suction cup support and appreciated the included cable protector for livestock-safe installations.

Key Features

• Compact size: The 2.4 in housing makes the pump easy to tuck into tight corners without obstructing aquascape or livestock movement.
• Strong flow: A 240 gph flow rate produces noticeable current suitable for circulation and simulating natural wavemaking in nano tanks.
• Energy efficient: At about 3.5 watts the pump runs with roughly 50% less power consumption than previous Koralia models while offering up to 20% more flow.
• Vibration control: The new patented vibration absorbing magnet and suction cup support reduce rattle and hold the unit securely on glass or acrylic up to 1/2 in thick.
• Adjustable direction: The sphere joint and compact design let you aim flow precisely to suit corals, plants, and livestock needs.
• Cable protector included: The built-in cable connector protects wiring from curious urchins, puffers, parrot fish and triggers for safer installations.

Who It's For

The Koralia Nano 240 is best for hobbyists running 16 to 28 gallon freshwater tanks or 10 to 15 gallon saltwater tanks who need a quiet, efficient wavemaker that does not dominate the tank visually. It suits reef-oriented nano systems and planted tanks where variable, directional flow and low heat output are important.

It is not the primary choice for much larger tanks where higher total turnover or multiple pump synchronization is required; users with very large systems should consider larger circulation options or multiple Koralia units controlled by an external controller.

Pros & Cons

Pros

• Compact footprint and adjustable sphere joint allow precise flow placement with minimal visual impact.
• Quiet operation with effective magnet-suction mounting reduces vibration and keeps noise low.
• Low power draw yields energy savings while maintaining strong 240 gph performance.
• Includes cable protector, improving safety around curious or abrasive fish and invertebrates.

Cons

• Single unit is best suited to nano to small tanks; larger aquaria will need multiple pumps for balanced circulation.
• No built-in controller is included, so advanced timing or modes require a separate controller for interval programming.

Specifications

Flow rate	240 gph
Recommended freshwater tank size	16 to 28 gallons
Recommended saltwater tank size	10 to 15 gallons
Power consumption	3.5 Watts
Unit size	2.4 in
Mounting	Patented vibration absorbing magnet and suction cup support
Includes	Cable protector / connector

Our Verdict

The Hydor Koralia Nano 240 is a smart, energy efficient choice for hobbyists with nano freshwater or small saltwater tanks who want strong, quiet circulation without bulky hardware. Its compact size, improved magnet mount and included cable protector make it good value for the money, though larger aquaria will require additional units or bigger pumps.

Frequently Asked Questions

Can the pump be used on acrylic tanks?
Yes, the magnet-suction system is designed to safely hold the Koralia Nano on glass or acrylic up to 1/2 in thick.

Is it noisy?
Customers and this review find the unit runs quietly thanks to the vibration absorbing magnet and heavy-duty suction cup design.

Does it include a controller?
No controller is included, but the Koralia Nano can be connected to compatible controllers for interval settings.