Nyos OPUS G2 250 Slim-Line Aquarium (54 Gallons)

Whether you're upgrading from a smaller reef aquarium or building your dream saltwater aquarium in a limited space, the OPUS G2 250 Slim-Line provides the premium features, exceptional build quality, and modern aesthetics serious reef hobbyists expect from Nyos.

Crystal Clear Viewing with Ultra-Clear Glass

The OPUS G2 250 Slim-Line showcases your reef with exceptional clarity thanks to premium ultra-clear low-iron glass on the front and side panels. Unlike conventional aquarium glass, low-iron glass eliminates the green tint, allowing the vibrant colors of your corals, fish, and aquascape to stand out naturally.

Transparent silicone seams and polished edges create a nearly invisible viewing experience, while the elegant rimless design enhances the aquarium's clean, contemporary appearance.

Hidden Overflow Maximizes Display Space

Nyos' signature Hidden Overflow system is positioned behind the rear panel, eliminating the bulky internal overflow box found in traditional reef-ready aquariums.

Benefits include:

• More usable display space
• Increased room for aquascaping
• Uninterrupted panoramic viewing
• Excellent surface skimming
• Quiet water movement
• Modern minimalist aesthetics

The result is a cleaner display that allows your corals and fish to become the true focal point of your aquarium.

Slim-Line Cabinet with Premium European Construction

The Slim-Line cabinet is designed for hobbyists who want premium quality while minimizing the aquarium's overall footprint.

Cabinet features include:

• Heavy-duty moisture-resistant construction
• Push-to-open cabinet door
• Premium European soft-close hinges
• Adjustable leveling feet
• Furniture-quality finish available in White or Basalt Grey
• Efficient cable management
• Easy access for maintenance and equipment

Its slim profile makes it an excellent choice for living rooms, offices, apartments, or any installation where space is at a premium without compromising on storage or accessibility.

Efficient Reef-Ready Sump System

The included glass sump is engineered specifically for today's reef aquarium equipment while maximizing usable filtration space within the Slim-Line cabinet.

Designed to accommodate:

• Protein skimmers
• Return pumps
• Filter socks
• Aquarium heaters
• Media reactors
• Auto top-off systems
• Dosing equipment
• Aquarium controllers and probes

An integrated freshwater reservoir provides convenient automatic top-off capability, helping maintain stable salinity and reducing maintenance.

Engineered for Long-Term Reef Success

The OPUS G2 250 Slim-Line delivers outstanding performance for hobbyists seeking a stable, reliable reef aquarium system.

Advantages include:

• Increased display volume for greater water stability
• Quiet overflow operation
• Spacious sump filtration
• Easy plumbing installation
• Exceptional equipment accessibility
• Premium German engineering
• Built for years of dependable reef keeping

Whether you're keeping SPS corals, LPS corals, soft corals, or marine fish, the OPUS G2 250 Slim-Line offers an outstanding foundation for a thriving reef ecosystem.

Premium Features

• Rimless ultra-clear low-iron glass aquarium
• Hidden rear overflow system
• Transparent silicone seams
• Precision-engineered PVC plumbing
• Glass sump filtration system
• Integrated freshwater ATO reservoir
• Slim-Line premium aquarium cabinet
• Soft-close push-to-open cabinet door
• Adjustable leveling feet
• Furniture-quality European construction
• Reef-ready plumbing system
• Modern minimalist design

Technical Specifications

• Display Aquarium Dimensions: 35.4" L × 17.7" W × 19.7" H (90 × 45 × 50 cm)
• Display Volume: 204 Liters (54 Gallons)
• Glass Thickness: 10 mm Ultra-Clear Glass
• Cabinet Dimensions: 35.4" L × 19.3" W × 35.4" H (90 × 49 × 90 cm)
• Sump Volume: Approximately 46 Liters (12.2 Gallons)
• ATO Reservoir Capacity: Approximately 18 Liters (4.8 Gallons)
• Recommended Return Pump: Approximately 1,500–2,000 LPH (400–525 GPH)

What's Included

Your Nyos OPUS® G2 250 Slim-Line Reef Aquarium System includes everything needed to build the foundation of a premium reef aquarium:

• Ultra-clear, rimless low-iron glass display aquarium
• Factory-installed Hidden Overflow System
• Precision PVC plumbing kit
• Glass sump filtration system
• Integrated freshwater auto top-off (ATO) reservoir
• Slim-Line premium aquarium cabinet
• Soft-close push-to-open cabinet door
• Adjustable leveling feet
• Filter sock and filter sock holder
• All necessary bulkheads and plumbing fittings
• Installation hardware
• Manufacturer's installation instructions