The Waterbox Frag 165.6 is the ultimate platform for serious coral collectors and propagation professionals. Spanning a massive 1800 x 600 x 400 mm, this system offers an expansive 180 cm (6-foot) footprint, providing incredible surface area for coral placement while maintaining the signature shallow profile of the Frag series. Constructed from Starphire Ultra-Clear™ glass, it combines a world-class display aesthetic with a high-volume filtration system, making it one of the most stable and visually stunning shallow reef systems on the market.
The Frag 165.6 is engineered to handle the high biological demands of a heavily stocked coral system while simplifying daily maintenance.
Massive 6-Foot Footprint: The 180 cm length allows for dramatic aquascaping and distinct coral zones, providing ample room for high-value colonies and grow-out racks.
Optimized Shallow Geometry: The 40 cm height ensures that high-PAR lighting reaches every corner of the tank with minimal loss, promoting rapid growth and intense coloration in SPS and LPS corals.
Starphire Ultra-Clear™ Glass: Features 15 mm low-iron glass panels that provide maximum clarity and eliminate the "green tint" found in standard glass.
Precision Plumbing Kit: Includes a dual-overflow design with a high-quality gate valve for ultra-silent, precise flow control and a "no-glue" assembly process.
Professional Glass Sump: A comprehensive filtration center featuring a dedicated refugium section, integrated ATO (Auto Top Off) reservoir, and adjustable water levels.
| Feature | Details |
| Aquarium Dimensions | 1800 x 600 x 400 mm (70.9" x 23.6" x 15.7") |
| Total System Volume | 622 Liters (164.4 Gallons) |
| Glass Thickness | 15 mm |
| Cabinet Height | 900 mm (35.4") |
| Sump Volume | 162 Liters (42.8 Gallons) |
| Filter Socks | 2 x 100 mm (4") |
Why choose the Frag 165.6 over a deeper Reef system?
The 40 cm height is a "sweet spot" for lighting. You can achieve high PAR levels across the entire sand bed without needing to run lights at 100% intensity, reducing electricity costs and heat transfer.
Is the cabinet designed for the weight of a 6-foot tank?
Yes. The Waterbox Frag 165.6 comes with a marine-grade, UV-coated plywood cabinet featuring reinforced internal supports to handle the substantial weight of over 600 liters of water.
What kind of lighting is recommended for this length?
For a 180 cm tank, a minimum of 3 to 4 high-output LED fixtures (like Radion XR30s or Hydra 64s) or a 60-inch T5/LED hybrid fixture is recommended to ensure even coverage.
Can I run a manifold on the included plumbing?
While the plumbing is "ready-to-assemble," many hobbyists easily modify the return line to include a manifold for running additional reactors or chillers, thanks to the accessible sump design.
Waterbox Mesh Lid 1860: A critical accessory for open-top tanks to prevent fish loss while maintaining gas exchange.
Ecotech Marine MP40mQD: Due to the 180 cm length, a pair of MP40 or MP60 QuietDrive pumps is ideal for creating the high-volume gyre flow needed for a reef of this size.
Nyos Quantum 160 Skimmer: A high-performance protein skimmer that fits perfectly within the internal footprint of the Frag 165.6 sump.
