RED SEA - Reefer-S 850 G3 Deluxe - Black - 850l - 3 ReefLED 1170 and 3 stems

RED SEA Reefer 850 G3 Deluxe reef aquarium: a premium format for a large-scale marine project

The RED SEA Reefer 850 G3 Deluxe was designed for aquarists who want a large setup without compromising on build quality or ergonomics. At 180 cm long , 68 cm wide , and with a height carefully considered for everyday comfort, it offers a strong visual presence while maintaining a practical approach to maintenance. Its total volume of 850 liters allows for the creation of a spacious, vibrant, and balanced reef aquascape, with ample room to structure the landscape, distribute coral colonies, and allow fish to thrive. This kind of capacity makes all the difference: the entire system gains stability, management becomes more straightforward, and the final result takes on a whole new dimension in the room.

Deluxe version with 3 ReefLED 170s and 3 brackets: consistent reef lighting ready to enhance your aquarium

This Deluxe version comes with three ReefLED 170s and three mounting brackets , providing a complete and cohesive lighting system to illuminate the entire length of the tank. For a reef aquarium of this size, this is a real advantage, as well-distributed lighting is crucial for both visual appeal and the well-being of the corals. The installation maintains a clean, modern, and elegant look, eliminating the need for separate suspension solutions. The result is crisp, uniform, and visually stunning. This equipment choice gives the Reefer 850 G3 Deluxe a truly premium feel, ready to support a serious reef project right from the start.

Red Sea G3 range: a major evolution that improves comfort, reliability and everyday handling

The Red Sea G3 series represents a true step up from previous generations. This isn't just a cosmetic update. The entire design has been revamped to make the aquarium more user-friendly, more stable, and easier to maintain. The 3-in-1 ReefATO+ system is now integrated, offering more precise water level and salinity control—a crucial feature in a large marine aquarium. The G3 generation also introduces a new ReefMat Ready sump , an enlarged overflow , a new downflow receptacle , a new ReefGate control valve , and improved hydrodynamic piping . In practice, this translates to a smoother, more convenient, and frankly more refined system.

Ultra-clear 19mm glass tank and reinforced structure for a spectacular view of the reef

The Reefer 850 G3 Deluxe Black features a 19mm ultra-clear glass tank on the front, sides, bottom, and back. This choice immediately conveys an impression of robustness and quality, while offering exceptional visual clarity. The colors of the corals, the nuances of the fish, and the depth of the aquascape are showcased with remarkable sharpness. In this generation, the thickness of the glass panel at the bottom, where it meets the cabinet, has been reinforced , providing even greater long-term stability. The tank also benefits from a discreet yet elegant black internal band , which contributes to the overall rigidity of the unit while maintaining a high-end, meticulously crafted finish.

Sturdy Marine-Spec furniture made of marine plywood and a structure designed to last

The cabinet does far more than simply complement the aquarium. It plays a vital role in the perceived quality and overall reliability of the setup. The Reefer 850 G3 Deluxe rests on a marine plywood cabinet , designed to withstand humidity and the specific stresses of a reef environment. This solid base inspires confidence, especially for a system of this size. The adjustable feet facilitate leveling, a crucial detail when installing such a large aquarium on a surface that isn't always perfectly flat. The visual appearance remains very clean, particularly since the adjustment mechanisms are concealed. The overall impression is one of serious, crisp, and durable craftsmanship—exactly what one expects from a premium aquarium.

Enlarged central overflow and silent water drain for cleaner operation

In a large marine aquarium, quiet operation and controlled flow are essential. Red Sea has clearly addressed this aspect in the Reefer 850 G3 . The central overflow features a large intake area, equipped with removable combs that facilitate cleaning and simplify regular maintenance. The wide downpipes have been redesigned to reduce turbulence and therefore noise. Their rectangular inlet further improves water circulation. This approach ensures a clean surface, efficient suction, and much quieter operation, which makes all the difference when the aquarium is located in a living space.

High-precision ReefGate valve and advanced hydrodynamic piping for better-controlled circulation

The entire hydraulic system has been redesigned to make it more efficient and easier to adjust. The Reefer 850 G3 is equipped with the new ReefGate valve , a high-precision valve installed on the downpipe for fine-tuning the flow rate. Adjustment is simpler, and operation becomes virtually silent once the system is balanced. In addition, the aquarium benefits from advanced hydrodynamic piping designed to maintain a strong and consistent flow throughout the system. The presence of 32 mm dual-nozzle pump outlets allows for better distribution of the return water, with the option to connect one or two return pumps depending on the chosen configuration. This is a real advantage for those who want to build a clean, efficient, and scalable system.

Reef-Spec ReefMat Ready settling tank: a modern, modular and easy-to-use technical space

The Reef-Spec sump of the Reefer 850 G3 was designed to meet the current needs of reef aquarists. With its 170-liter capacity , it offers ample space for organizing your equipment without feeling cramped. It is refugium-ready and ReefMat compatible , providing plenty of room to build a modern and scalable filtration system. Features include a height-adjustable skimmer compartment , micron bags , a removable media cup , and a bubble trap to prevent microbubbles from returning to the main tank. The sump extension can also be used in various ways: as a frag tank, a large refugium, for supplemental filtration, or even as a reservoir for RO or saltwater for water changes. This level of flexibility is particularly valuable in a system of this caliber.

ReefATO+ included and smart control for enhanced everyday stability

All G3 models now come equipped with ReefATO+ , a real advantage for large marine aquariums. This system helps maintain a constant water level and stable salinity , two essential parameters for the well-being of the tank's inhabitants. It also integrates a precise temperature probe and a highly sensitive leak detector , further enhancing the system's safety. Control via the ReefBeat app adds a highly practical dimension for monitoring the system and keeping an eye on important parameters. This intelligent integration makes the aquarium more reassuring to use on a daily basis, especially for ambitious and long-term projects.

A RED SEA 850-litre aquarium designed for enthusiasts who want a high-end and expandable base.

The RED SEA Reefer 850 G3 Deluxe Black isn't just a large marine aquarium. It was designed as a premium base, capable of supporting a demanding reef project over the long term. It allows for the freedom to choose other technical components according to individual preferences, as the circulation pump, main pump, skimmer, and ReefMat are not included in this version, allowing for true customization of the setup. Its black design, red tubing with black elbows, high-quality construction, and numerous G3 enhancements make it a very attractive system for those who want an aquarium that is as high-performing as it is elegant. Furthermore, a 3-year extended warranty is included after tank registration, with the option to extend it further through Red Sea . For an exceptional reef project, it lays a particularly solid foundation.