OPUS G2 250 Aquarium w/ Grey Pro-Line Cabinet (53 Gallons) - Nyos

Nyos OPUS G2 250 Aquarium with Grey Pro-Line Cabinet (53.9 Gallons) - Ready-to-Use Reef System

Elevate your reefkeeping with the Nyos OPUS G2 250, a premium, ready-to-use reef aquarium system that perfectly blends world-class aesthetics, robust build quality, and cutting-edge functionality.

Designed for the discerning aquarist, the OPUS G2 series focuses on eliminating distractions so you can fully immerse yourself in the beauty of your coral and fish. The included Basalt Grey Pro-Line Cabinet provides a striking, modern foundation with superior features and extra working space.

Key Features

Exceptional Display Tank

• 53.9 Gallon (204 L) Display Volume: A perfect size for a thriving reef or fish-only system.
• Ultra-Clear Low-Iron Glass: The front and both side panes are crafted from ultra-clear glass, significantly reducing the green tint of conventional glass. This ensures the most vibrant and true-to-life colors for your corals and fish.
• Rimless "Pool Tank" Design: Enjoy an unimpeded, minimalist view with no distracting side or cross bars. The use of transparent silicone further minimizes visual obstruction.
• Hidden External Overflow: The overflow box is discreetly recessed into the back pane, maximizing the available space for aquascaping and keeping the display tank's rear clear and easy to clean.
• Deep Blue Back Pane: A precisely tailored dark blue lacquer on the back glass enhances the illusion of depth and creates a stunning, realistic underwater effect.

Robust Pro-Line Cabinet

• Extravagant Cubic Design: The Pro-Line cabinet offers a larger footprint than the tank, providing valuable additional storage space for your equipment and accessories.
• Basalt Grey Matte Finish: A modern, timeless color with a sleek matte finish.
• Superior Durability: Constructed from moisture-resistant boards with a durable melamine resin coating, the cabinet is extremely scratch and impact-resistant. Waterproof pads are included on the inside for extra protection.
• Premium Soft-Close Doors: Features high-quality Blum 125° hinges with a soft-close system and a recessed push-to-open mechanism for convenient, quiet access.
• Concealed Sand Edge: The special Pro-Line design recesses the aquarium, hiding the bottom silicone seam and the sand line for a cleaner, floating aesthetic.

Advanced Sump and Plumbing

• Pre-Assembled PVC Plumbing: The system comes with all required PVC piping pre-assembled—no cutting or gluing required, ensuring a quick and secure setup.
• Silent Herbie-Style Drain: The two-drain system utilizes a Herbie-style configuration with an adjustable valve on the main drain to minimize noise, plus a separate emergency drain for peace of mind against clogs.

• Simplified, Functional Sump: A large, multi-chamber glass sump provides ample room for essential filtration gear.

• Large Skimmer Chamber: Measures 9.5" x 20" (24 x 49.5 cm) with a constant 8-inch water level, ideal for housing a high-performance protein skimmer, media reactors, or algae reactors.
• Includes a durable Nylon Filter Sock for removing particulate debris.
• XL Integrated ATO Reservoir: A separate, large-capacity refill tank holds 5.3 gallons (20 L) of RO water, providing a reliable supply for approximately one week of evaporation. 

Specifications

What's Included in the Box

• OPUS G2 250 Rimless Aquarium (with External Overflow Box)
• Grey Pro-Line Cabinet (Matte Finish)
• Glass Sump
• Separate ATO (Auto Top-Off) Reservoir
• Pre-Assembled PVC Plumbing Kit
• Nylon Filter Sock