Fiji Cube

Advanced Hang On Back Refugium PRO Series - Large

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The perfect way to add a refugium to any sumpless aquarium!

  • Compact and robust hang-on design
  • Fiji Flow 300DC Nano DC Pump with a digital flow controller
  • Full top brace support
  • Spacious chamber design for refugium, segregation or acclimation purposes
  • Probe and dosing tube holders
  • Full cast acrylic for extra strength
  • Polycarbonate cover
  • Removable refugium light support
  • Efficient and powerful pump
  • Ideal for 30-45 gallon systems


Refugiums can add a convenient and natural way to grow various types of macroalgae, which can significantly decrease dissolved wastes which might lead to algae blooms. At the same time, these small refugiums also provide a safe-haven for desirable copepods amphipods to feed and reproduce, and this can create a renewable source of food for fish and invertebrates in the display. Fiji Cube's compact refugiums create the perfect environment for cultivating algae and copepods, with a unique baffle system that provides gentle flow-through to deliver the nutrients the organisms need while avoiding excess currents. Refugiums can also be a way to safely introduce new fish or coral to the tank while giving them a place to feed and acclimate to the water conditions.


The Fiji Cube Advanced Hang On Back Refugium Box features full brace support to prevent bowing. The unique hanging bracket system provides a robust and secure mount to your aquarium for extra safety. The brace design also features test probe and dosing tube holders to make the aquarium system complete.


The PRO Series of Fiji Cube HOB Refugiums also includes a Fiji Flow DC return pump with a digital controller.The Fiji Flow Nano DC pump allows flow adjustment to control how much water flows through the refugium, providing versatility to your setup needs. Its ceramic shaft design produces less heat, requires less maintenance, and can be operated at safer, lower voltages when compared to traditional motor-driven pumps. The controller is easy to use with both adjustable flow and a dedicated Feed Mode.




Dimensions - 12"L x 5"W x 12"H

Distance Between Hanging Arms - 12"

Pump Dimensions - 3.3"L x 2.15"W x 3.6"H

Pump Power - 15W

Pump Power Cord Length - 48"

Pump Max. Flow - 300gph


What's Included?

More Information
UPC 735263548852
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Product Questions

How many gallons does this hold?
Question by: Chris on Feb 20, 2023, 3:56 PM
This will hold up to approximately 3 gallons.
Answer by: William Reed (BRS Staff) on Mar 23, 2023, 10:13 AM
Would this fit on the side of a standard 4ft long 1 ft wide 55 gallon rimmed aquarium?
Question by: Rustin Haywood on Feb 6, 2023, 8:03 PM
Thanks for the question! Here are the dimensions! Dimensions - 12"L x 5"W x 12"H

Distance Between Hanging Arms - 12"
Answer by: James Johnson (BRS Staff) on Feb 24, 2023, 3:04 PM
Does this adjust so you can hang it on a rimmed tank?
Question by: Cody on Jan 18, 2023, 10:26 PM
Hey There, thanks for the question! This does have some adjustment to it yes!
Answer by: James Johnson (BRS Staff) on Feb 9, 2023, 12:32 PM