The WaterBox Platinum REEF 100.3 is a high-capacity, reef-ready system that offers the perfect balance of volume and footprint for serious aquarists. Measuring 900 x 600 x 550 mm, this 3-foot system provides a massive 600 mm (24") depth, allowing for intricate aquascaping and significant water stability. Built with Starphire Ultra-Clear™ glass, the REEF 100.3 utilizes a professional-grade glass sump and a "no-glue" plumbing system, making it an ideal choice for housing diverse coral colonies and larger marine fish communities.
The REEF 100.3 is engineered to provide a robust foundation for a thriving, long-term reef environment.
Starphire Ultra-Clear™ Glass: Constructed with 12 mm low-iron glass on all viewing panels, ensuring maximum clarity and structural integrity with a 91% transmittance rate.
Triple-Filter Sock Chamber: The professional glass sump features three 100 mm filter sock silencers to provide superior mechanical filtration while maintaining a whisper-quiet environment.
Precision Gate Valve: The plumbing kit includes a high-precision gate valve, allowing for micro-adjustments to the drain flow to achieve a silent, "Bean Animal" style overflow.
Integrated Refugium Section: The sump includes a removable baffle system, allowing you to easily dedicate a section of the filtration for nutrient-exporting macroalgae or a cryptic zone.
UV-Coated Plywood Cabinet: The 900 mm tall cabinet is built from water-resistant, marine-grade plywood with soft-close doors and a specialized coating to prevent swelling in humid environments.
| Feature | Details |
| Tank Dimensions | 900 x 600 x 550 mm (35.4" x 23.6" x 21.7") |
| Cabinet Dimensions | 900 x 600 x 900 mm (35.4" x 23.6" x 35.4") |
| Total System Volume | 363 Liters (96 Gallons) |
| Display Water Volume | 277 Liters (73.2 Gallons) |
| Glass Thickness | 12 mm (Display) / 6 mm (Sump) |
| ATO Reservoir | Integrated 17.1 Liter Glass Tank |
What makes the "100.3" different from smaller models?
The "100.3" introduces a three-sock filtration system and a significantly larger display volume, making it much more stable for sensitive SPS corals compared to nano or smaller cube systems.
Does the plumbing require glue?
No. The WaterBox Platinum series features a proprietary Quick-Connect plumbing system. All pipes are pre-cut and threaded, allowing for a tool-free, "no-glue" assembly that is easy to maintain.
Can I fit a media reactor in the sump?
Absolutely. The REEF 100.3 sump is specifically designed with extra space in the skimmer and return chambers to accommodate reactors for carbon, GFO, or bio-pellets.
What kind of lighting is recommended for this size?
Due to the 900 mm (3-foot) length and 600 mm depth, most users opt for two AI Prime 16HDs or two Radion XR15s. For high-demand SPS tanks, a single Radion XR30 or a 36" T5/LED hybrid fixture is ideal.
Tropic Marin Pro-Reef Salt: The gold standard for a system of this caliber to ensure balanced calcium, magnesium, and alkalinity.
Sicce Syncra SDC 6.0: A powerful, Wi-Fi controllable DC return pump that provides the perfect flow rate for the REEF 100.3.
Triton ICP-OES Test Kit: To maintain a large system like this, regular laboratory testing is recommended to keep trace elements in check.
