Nyos OPUS G2 300 Aquarium w/ Slim-Line Cabinet

Premium Design Meets Practical Performance

The Nyos OPUS G2 300 is a refined 69-gallon saltwater aquarium system designed for reefkeepers who demand clean aesthetics, smart engineering, and premium materials—without the DIY headaches. Available at Reef Supplies Canada, this all-in-one reef-ready system includes ultra-clear glass, a minimalist Slim-Line cabinet, external overflow box, sump, and pre-assembled plumbing—so you can focus on what matters most: the reefing experience.

Display Tank Highlights:

• 69 Gallon Display Volume

• Ultra-Clear Glass on Front and Side Panels

• External Overflow Box

• Transparent Silicone for an Unobstructed View

• Dark Blue Rear Glass Panel for Enhanced Depth

Crafted with ultra-clear glass on the front and side panels, the OPUS G2 300 allows your corals and fish to pop with natural vibrancy. The recessed external overflow box maximizes internal aquascaping space while simplifying maintenance. A tailored deep-blue background enhances contrast and creates a visually immersive underwater environment.

Slim-Line Cabinet Features:

• Cabinet Dimensions: 35.4"L x 21.7"W x 35.4"H

• Total Height with Aquarium: 4' 8"

• Push-to-Open Doors with Recessed Handles

• Durable Melamine Coating – Scratch & Impact Resistant

• Waterproof Interior Pads

• Available in White or Basalt Grey Matte Finish

The Slim-Line cabinet matches the footprint of the aquarium for a seamless, minimalist profile. It’s taller than the previous generation for easier access to the sump, and thanks to its modern finish and clean lines, it fits beautifully into both modern and classic interiors.

Efficient Sump & Quiet Plumbing:

• Sump Dimensions: 20"L x 20"W x 13.8"H

• Sump Water Volume: 14 Gallons (at 8" water depth)

• Skimmer Chamber: 11.8" x 20"

• Return Chamber: 7.9" x 8.7"

• ATO Reservoir: 4.7"L x 16.5"W x 20"H (6 Gallon Volume)

The included sump is designed for functionality and flexibility. With designated zones for a skimmer, reactor, or refugium, and a stable water level of ~8", it supports a wide range of reef equipment. Nylon filter socks are included to capture large debris. The plumbing is fully pre-assembled in a dual-drain Herbie configuration, reducing noise while providing backup redundancy.

Plumbing Specs:

• Primary Drain: 32mm

• Emergency Drain: 20mm

• Return Plumbing: 20mm

What’s in the Box:

• Nyos OPUS G2 300 Aquarium with External Overflow

• White Slim-Line Cabinet (Matte Finish)

• Glass Sump

• 6 Gallon ATO Reservoir

• Pre-Assembled PVC Plumbing

• Filter Socks

Note: Return pump not included. A pump rated for approximately 525 GPH is recommended.