The Fiji Cube 81 Gallon External Overflow Rimless Tank is a premium display tank designed for serious aquarists who desire maximum aquascaping space and a highly customizable filtration setup. Its sleek, rimless design, combined with an external overflow system, makes it a popular choice for reef keeping and other specialized aquatic habitats.
Key Features
- Rimless Design:Offers an unhindered, crystal-clear view of the aquarium interior.
- Ultra-Clear Low Iron Glass:Constructed with extra-thick, low iron glass panels to ensure superior light transmission and true, vibrant colors.
- External Overflow (EXT) System:Utilizes a slim, low-profile overflow box made of full cast acrylic that is attached externally to save maximum room inside the display area.
- Advanced Water Flow:Comes with an appropriate size external overflow and a dual return nozzle kit. The overflow box supports quiet and safe plumbing options, including the efficientHerbiedesign and the customizableBean Animaloverflow for larger systems, featuring an emergency drain for added safety.
- Quality Construction:The overflow box features high-quality, heat-bent acrylic construction with a top-braced external box. It includes a slim profile and a removable surface skimmer weir box for both aesthetic display and practicality.
Technical Specifications (Tank Only)
| Component | Detail |
| Volume | 81 Gallons |
| SKU | EXT-81 |
| Tank Type | External Overflow (EXT) Rimless Tank |
| Glass Type | Ultra-Clear Low Iron Glass |
| Glass Thickness | Extra thick glass (specific thickness not listed on the product page, but noted as “extra thick”) |
| Plumbing Compatibility | Supports “Herbie” or “Bean Animal” overflow methods |
| Included Hardware | External Overflow Box (Full Cast Acrylic) and Return Nozzle Kit |






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