Nyos OPUS G2 200 Slim-Line Aquarium (44 Gallons)

Whether you're building your first reef aquarium or creating a sophisticated nano-plus reef display, the OPUS G2 200 Slim-Line provides outstanding performance, elegant aesthetics, and the flexibility needed for long-term reef success.

Crystal Clear Viewing with Ultra-Clear Glass

Experience your reef without compromise. The OPUS G2 200 Slim-Line features premium ultra-clear low-iron glass on the front and side panels to maximize clarity and color accuracy while eliminating the green tint found in standard aquarium glass.

Transparent silicone seams and precision-polished edges create an almost invisible viewing experience that allows your corals, fish, and aquascaping to become the centerpiece of any room.

The sleek rimless design enhances the aquarium's contemporary appearance while providing unobstructed viewing from multiple angles.

Hidden Overflow Maximizes Display Space

Nyos' signature Hidden Overflow system is discreetly positioned behind the rear glass panel instead of inside the display aquarium. This innovative design preserves valuable aquascaping space while maintaining a clean, uninterrupted view of your reef.

Benefits include:

• More room for live rock and coral placement
• Clean, uninterrupted viewing
• Improved aquascaping flexibility
• Excellent surface skimming
• Quiet, efficient water circulation
• Modern minimalist appearance

Slim-Line Cabinet with Premium Construction

The Slim-Line cabinet is designed for hobbyists who want premium quality in a more compact footprint. Despite its smaller dimensions, the cabinet provides excellent access to equipment while maintaining a refined furniture-quality appearance.

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 routine maintenance

The cabinet's compact design makes it ideal for installations where floor space is limited without sacrificing quality or functionality.

Efficient Reef-Ready Sump System

The included glass sump is thoughtfully designed to maximize filtration performance while fitting within the Slim-Line cabinet.

The sump accommodates today's most popular reef equipment, including:

• Protein skimmers
• Return pumps
• Filter socks
• Aquarium heaters
• Auto top-off systems
• Filter media
• Dosing equipment
• Controller probes

An integrated freshwater reservoir provides convenient automatic top-off functionality to help maintain stable salinity.

Built for Reliable Reef Keeping

The OPUS G2 200 Slim-Line delivers the same engineering excellence found throughout the OPUS G2 family.

Advantages include:

• Stable reef-ready water volume
• Quiet overflow operation
• Efficient sump filtration
• Easy plumbing installation
• Premium European craftsmanship
• Simple maintenance access

Whether you're keeping SPS corals, LPS corals, soft corals, or a vibrant collection of marine fish, the OPUS G2 200 Slim-Line provides an excellent platform for long-term reef success.

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: 31.5" L × 17.7" W × 19.7" H (80 × 45 × 50 cm)
• Display Volume: 168 Liters (44 Gallons)
• Glass Thickness: 10 mm Ultra-Clear Glass
• Cabinet Dimensions: 31.5" L × 19.3" W × 35.4" H (80 × 49 × 90 cm)
• Sump Volume: Approximately 40 Liters (10.6 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 200 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 required bulkheads and plumbing fittings
• Installation hardware
• Manufacturer's installation instructions