OPUS G2 440 Aquarium w/ Pro-Line Cabinet (Grey)

$3,200.00 $3,200.00

1 x OPUS G2 440 Pro-Line (Tank Only)   + $0.00
1 x OPUS G2 440 Pro-Line Cabinet (Grey)   + $0.00

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    High-Quality Craftsmanship Down to the Last Detail

    • 100 Gallon Display Volume
    • Ultra-Clear Glass on Viewing Pannels
    • External Overflow Box
    • Robust Pro-Line Cabinet
    • Includes Sump & Pre-Assembled Plumbing


    With the OPUS G2 series, Nyos created ready-to-use reef aquariums that will satisfy the desire for quality, functionality, and aesthetics. Every detail was paid attention to and as a result, nothing distracts from the most important thing: The reefing experience.

    OPUS Aquariums are available in a variety of aquarium and stand combos. The Pro-Line features a more cubic cabinet design with a slightly larger footprint and a concealed sand edge. The Slim-Line cabinet matches the footprint of the aquarium, leading to a sleeker design with a minimalist appearance. The Slim-Line and Pro-Line versions are available in your choice of either White or Basalt Grey. 


    OPUS G2 Tank

    The front and both side viewing panels are produced from ultra-clear glass so that the colors of the fish and corals appear more vibrant. The OPUS G2 is equipped with an external overflow box recessed in the back pane. With no interfering overflow box inside the aquarium, additional space is available for aquascaping and it's easier to keep the back of the aquarium clean. The back pane is finished in a precisely tailored dark shade of blue to create the perfect illusion of a realistic underwater world and depth effect. In order to detract as little as possible from the reef experience, only transparent silicone is used in the display tank.


    OPUS G2 Pro-Line Cabinet

    Available in modern basalt gray or a timeless white finish, special attention was paid to the functional and aesthetic design of the OPUS G2 cabinets. Thanks to a durable melamine resin coating, the surfaces are extremely scratch and impact resistant. Furthermore, the cabinets are equipped with waterproof pads on the inside. The doors can be conveniently opened with the recessed push-to-open system and the height has been increased vs the G1 model, making performing maintenance in the sump area a breeze. Furthermore, the design allows for the bottom silicone seam as well as the sand edge to be concealed, giving the overall aquarium and stand combo a great look. 


    OPUS G2 Sump & Plumbing

    The sump included is simple, yet highly flexible. Nylon filter sock(s) are included to remove larger debris or uneaten fish food. In the second chamber, you'll find room for multiple devices such as a skimmer, media reactor, or algae reactor. With a constant water level of approx. 8", it's ideal for most protein skimmers.

    The plumbing for all OPUS G2 aquariums is pre-assembled, meaning no PVC cutting or gluing required. The drain system is set up in a two-drain Herbie style configuration, which minimizes drain noise while also providing an emergency drain in the event of a clog in the primary drain.



    The Aquarium

    Aquarium dimensions: 49.2"L x 21.7"W x 20.9"H

    Display Tank Volume: 100 Gallons

    Glass Thickness: 12 mm (0.47")


    The Cabinet

    Cabinet Dimensions: 52.6"L x 25.8"W x 35.4"H

    Total height w/ Aquarium: 4' 8"

    Height-Adjustable Feet: Yes

    Sand Edge Concealed: Yes

    Hinges: Premium 125° with soft-close


    The Sump

    Sump Dimensions: 23.6"L x 20"W x 13.8"H

    Sump Water Volume: 16.4 Gallons (at 8" water depth)

    Skimmer Chamber: 13" x 20"

    Return Chamber: 8.9" x 8.7"

    ATO Reservoir Dimensions: 6.7"L x 16.5"W x 20"H

    ATO Water Volume: 6 Gallons


    The Plumbing

    Primary Drain: 32mm

    Emergency Drain: 20mm

    Return Plumbing: 20mm



    What's Included?

    OPUS G2 440 Aquarium (w/ external overflow box)

    Grey Pro-Line Cabinet (matte finish)

    Glass Sump

    ATO Reservoir

    Pre-Assembled PVC plumbing

    Filter Socks


    Note: Return pump not included. A pump with a flow rate of approximately 525 GPH is recommended.


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    Product Questions

    Looking to possible purchase this tank. My one question is if a ReefMat Fleece Roller Filter will fit in this sump and if the filter sock area is removable to accommodate.
    Any assistance is greatly appreciated.
    Question by: peter szpakowski on Feb 26, 2024, 7:50 PM
    Hey there,
    Thank you for reaching out to us. From the product details of the ReefMat 500 Fleece Roller Filter will work.
    The OPUS G2 440 Aquarium w/ Pro-Line Cabinet Sump Dimensions: 23.6"L x 20"W x 13.8"h .
    The ReefMat 500 Fleece Roller Filter Specifications are
    Rec. Tank Size - Up to 130 gallons
    Max. Flow Capacity - 1580 GPH
    Fleece-mat Width - 4.4"
    Fleece-mat Length - 92'
    Unit Dimensions - 8.3" x 10.6" x 16.7"
    Media Basket - 350mL Please let me know if you need anything further.
    Answer by: Thomas Wofle (BRS Staff) on Feb 27, 2024, 10:21 AM
    I keep looking at this setup and am I'm leaning heavily toward this tank and stand. I want to do a fleece roller instead of filter socks. What size socks are these? I can't find that info online anywhere. I was wanted to make sure it was one of the ones that easily upgradeable with one of those drop in units.
    Question by: Kevin Matthews on Jan 8, 2024, 5:06 AM
    Hey there, thanks for the question! They will be 4" filter socks.
    Answer by: Grace (BRS Staff) on Jan 26, 2024, 1:29 PM