Red Sea Reefer S-550 G3+ - Black Cabinet

Red Sea Reefer S-550 G3+ - Black Cabinet

The Red Sea Reefer S-550 G3+ - Black Cabinet is a 549 litre (145.1 US gallon) premium reef-ready aquarium system combining a 448 litre (118.4 gallon) ultra-clear glass display, a 101 litre (26.7 gallon) REEF-SPEC filtration sump, a black aluminum-superstructure cabinet, and integrated ReefControl Pro automation. Measuring 120 cm (47.2 inches) long and 68 cm (26.8 inches) from front to back, it provides considerably more aquascaping depth than a conventional four-foot aquarium while offering the freedom to select lighting, circulation, and filtration equipment individually.

The REEFER S-550 G3+ combines 19 mm ultra-clear front glass, eurobracing with additional bottom reinforcement, a marine-spec anodized aluminum cabinet frame, and replaceable exterior panels. The cabinet includes a slide-out control panel and dedicated equipment space, while the aquarium uses dual curved return outlets, ReefGate precision drainage, and a ReefMat-ready sump. The included ReefControl Pro Controller and ReefControl ATO Module provide automatic freshwater top-off and connected monitoring without requiring a separate ATO controller.

Red Sea Reefer S-550 G3+ - Black Cabinet Features

• 120 cm (47.2 inch) reef display: The four-foot aquarium provides room for separated rock structures, coral colonies, open swimming channels, and accessible areas around the aquascape.
• 68 cm (26.8 inch) front-to-back depth: The deeper REEFER-S footprint provides more room for layered rockwork, reef islands, caves, and front-to-back coral placement than narrower standard-format REEFER aquariums.
• 19 mm (0.75 inch) ultra-clear front glass: The substantial low-iron viewing panel reduces unwanted glass tint while offering a clear view of the reef through Red Sea's reinforced construction.
• Eurobracing and bottom reinforcement: The glass aquarium incorporates upper perimeter bracing, additional bottom bracing, and high-quality euro-silicone bonding.
• Black aluminum cabinet superstructure: A rigid marine-spec anodized aluminum frame provides structural support, with replaceable black exterior panels and hidden adjustable leveling feet.
• Customizable reef-ready configuration: The system includes its aquarium, cabinet, sump, plumbing, and ReefControl hardware while allowing aquarists to choose their own lighting, return pump, skimmer, and wavemakers.

Marine-Spec Aluminum Cabinet and Slide-Out Control Panel

The REEFER-S cabinet differs from the conventional plywood-focused REEFER cabinet design. Its anodized aluminum superstructure supports the aquarium, while replaceable exterior panels, concealed leveling feet, and an integrated equipment-management area make it easier to plan a larger reef installation.

• Anodized aluminum support frame: The marine-spec superstructure provides a rigid foundation for the eurobraced aquarium and the equipment housed below it.
• Replaceable black exterior panels: The cabinet combines a dark furniture-style finish with a frame-and-panel design that allows exterior components to be replaced.
• Hidden adjustable feet: Heavy-duty leveling adjustments are concealed beneath the cabinet, helping establish correct support while maintaining a finished appearance.
• Slide-out control panel: The panel provides a designated mounting area for compatible controllers, power equipment, dosing hardware, and related accessories, improving access and cable organization.
• Additional equipment compartment: The cabinet provides separate space intended for compatible chiller equipment and other accessories. Equipment dimensions and ventilation requirements should be checked before installation.
• Moisture-resistant cabinet components: Splash-resistant exterior finishes and corrosion-resistant hardware are intended for the humid environment surrounding a marine aquarium sump.

ReefControl Pro and Digital Automatic Top-Off

The S-550 G3+ includes Red Sea's ReefControl Pro Controller and ReefControl ATO Module. This connected combination manages evaporation-related freshwater replacement and provides temperature monitoring, while leaving connections available for additional compatible ReefSense equipment.

• ReefControl Pro included: Supports up to seven compatible ReefSense digital probes or sensors and two 12V DC devices, providing expansion capacity for future aquarium monitoring and control.
• Automatic freshwater replenishment: The ReefControl ATO Module uses a digital level sensor and dedicated DC pump to replace evaporated freshwater and help maintain a consistent sump water level and salinity.
• Integrated temperature monitoring: The ATO level sensor also measures aquarium temperature, making readings and available notifications accessible through the ReefControl system.
• Connected ReefBeat management: Compatible devices and sensors can be monitored through Red Sea's ReefBeat ecosystem, including available readings, operating history, and alerts.
• Optional ReefSense expansion: Additional compatible probes for pH, salinity, ORP, and other parameters can be selected separately to suit the aquarium's monitoring requirements.
• Optional equipment control: ReefControl Power can extend connected AC equipment management, while the Pro controller provides its own supported DC device connections.
• Standard package clarification: ReefControl Pro and the ATO Module are included, but the separately specified ReefSense pH and temperature probe and other accessories associated with MAX packages are not included with this bare reef-ready configuration.

Quiet ReefGate Overflow and Dual 25 mm Returns

The REEFER S-550 G3+ moves surface water into the sump through an enlarged central overflow and hydrodynamically designed plumbing. Red Sea's ReefGate precision valve allows small adjustments to the drainage rate, while two curved return outlets provide flexibility for configuring circulation back into the display.

• Two curved 25 mm (approximately 1 inch) return outlets: The dual connections can be supplied by one compatible return pump or two separate pumps, depending on the planned installation.
• ReefGate precision valve: Fine control over the main downflow helps balance the overflow operating level against the return pump arrangement for quieter operation.
• Enlarged rectangular downflow inlet: The redesigned inlet reduces turbulence as water enters the drainage plumbing.
• Removable surface-skimming combs: Accessible sections around the central overflow allow accumulated deposits and debris to be removed during maintenance.
• Hydrodynamically optimized piping: Red Sea's plumbing design reduces unnecessary restrictions in the water path between the display and sump.
• Model-specific plumbing: The S-550 G3+ uses dual 25 mm returns. Customers replacing older REEFER-S G3 plumbing should confirm compatibility rather than assuming that the connection sizes are unchanged.

101 Litre REEF-SPEC Sump and ReefMat-Ready Filtration

The 101 litre (26.7 US gallon) sump provides separate space for mechanical filtration, protein skimming, and return circulation beneath the aquarium. Its removable filtration section, adjustable skimmer water level, and optional refugium-divider compatibility give aquarists several options when planning a custom reef filtration system.

• Two 225-micron mechanical filter bags: The included fine-mesh filters capture suspended particles entering the sump and can be removed for cleaning.
• Two filter media cups: The mechanical filtration area includes two cups for alternative filtration arrangements.
• ReefMat-ready compartment: The removable mechanical filtration section can accommodate compatible automatic fleece filtration without redesigning the supplied drain plumbing.
• Optional ReefMat 1200: Red Sea specifies the ReefMat 1200 for the equivalent MAX S-550 G3+ system, providing an identified automated filtration upgrade.
• Adjustable skimmer chamber: Operating water depth can be set between 21 and 27 cm (8.3-10.6 inches), a deeper adjustment range than that of standard REEFER G3+ models.
• Optional refugium divider: A compatible partition can establish a dedicated refugium area within the sump for additional biological filtration or nutrient-management planning.
• Single-sump configuration: The S-550 G3+ uses one main sump. The separate glass extension sump is a feature of the larger S-850 and S-1000 G3+ systems, not this model.

Choosing Equipment for the REEFER S-550 G3+

The S-550 G3+ is suited to customers who want the premium aluminum cabinet and deep REEFER-S display in a 120 cm (47.2 inch) installation. It provides a foundation for a carefully planned marine fish aquarium, LPS or soft coral display, or mixed reef with lighting, skimming, and circulation selected for the intended livestock.

• Recommended return pump: Red Sea specifies one ReefRun G2 8000 for the corresponding MAX S-550 G3+ configuration. The pump is sold separately with the standard system.
• Lighting reference: Red Sea specifies two ReefLED G2 170 fixtures for the MAX S-550 G3+. Alternative lighting can be selected for the 120 x 68 cm (47.2 x 26.8 inch) footprint and the planned coral species.
• Protein skimmer reference: The corresponding MAX configuration uses an RSK DC 600. Alternative skimmers should fit the sump and operate at the adjustable 21-27 cm (8.3-10.6 inch) water depth.
• Water movement: Red Sea lists two ReefWave 45 pumps with the equivalent MAX system. Independently selected wavemakers can supplement the sump return and direct flow around rockwork and coral colonies.
• Freshwater reservoir: The included ATO Module requires a suitable separate freshwater supply. Plan reservoir placement, top-off tubing, and access for refilling.
• Compared with the standard REEFER 425 G3+: The S-550 provides a deeper and taller display, 19 mm front glass, an aluminum cabinet superstructure, a slide-out control panel, and a deeper skimmer operating range.
• Compared with the S-700 G3+: Both share the 68 cm depth, 65 cm display height, ReefControl Pro, and dual 25 mm returns. The S-700 adds 30 cm (11.8 inches) of display length and 34 litres (9 US gallons) of sump volume.

Red Sea Reefer S-550 G3+ Black Specifications

• Total system water volume: 549 L / approximately 145.1 US gal.
• Display aquarium volume: 448 L / approximately 118.4 US gal.
• In-cabinet sump volume: 101 L / approximately 26.7 US gal.
• Display dimensions: 120 cm L x 68 cm W x 65 cm H / approximately 47.2 x 26.8 x 25.6 inches.
• Total height including cabinet: 153 cm / approximately 60.2 inches.
• Ultra-clear front glass thickness: 19 mm / approximately 0.75 inches.
• Glass construction: Eurobraced ultra-clear glass with additional bottom bracing and high-quality euro-silicone bonding.
• Cabinet: Black marine-spec anodized aluminum superstructure with replaceable panels, concealed adjustable leveling feet, and slide-out control panel.
• Return outlets: Two curved 25 mm connections for single- or dual-pump arrangements.
• Mechanical filtration: Removable ReefMat-ready compartment with two 225-micron filter bags and two media cups.
• Adjustable skimmer water depth: 21-27 cm / approximately 8.3-10.6 inches.
• Refugium: Optional dedicated sump-divider arrangement.
• Included aquarium controller: ReefControl Pro, supporting up to seven compatible ReefSense probes or sensors and two 12V DC devices.
• Included automatic top-off: ReefControl ATO Module with digital level and temperature sensor and DC top-off pump.
• Recommended return pump: ReefRun G2 8000, sold separately.
• Optional automatic filtration: ReefMat 1200, sold separately.
• Manufacturer warranty: Standard 3 years, extendable to 5 years at no additional charge when registered within 90 days of purchase, subject to warranty terms.

Red Sea REEFER G3+ Series Video

Shipping Notes

• Red Sea aquariums are exempt from our free shipping policy.
• To avoid delays, please order your aquarium separately from other products. If purchasing additional items, place one order for the aquarium and a second order for your other products.
• Orders shipping to the Northwest Territories, Yukon, or Nunavut require a shipping quote. Please call for details.
• Red Sea aquariums are brought in and shipped on an as-ordered basis. The average turnaround time before shipping is approximately two business days, except where noted below.
• All shipments outside the Vancouver area are sent by trucking company with fully insured residential delivery and power tailgate service.
• Orders within British Columbia and, in some circumstances, Alberta may require an additional 5-10 business days for processing. Orders from Alberta and provinces farther east generally ship directly from the distributor in Ontario within two business days.
• For in-store pickup, select that option at checkout to avoid delivery charges. You will be notified when the aquarium arrives, usually within 5-10 business days.
• Red Sea MAX S Series aquariums are always special order and generally require 3-6 weeks before shipping.
• Freight delivery includes transporting the aquarium to the destination address and unloading it. The freight company is not responsible for carrying the aquarium inside the building.
• Freight charges have been substantially subsidized to help reduce the delivery cost of your new Red Sea aquarium.
• Rural, remote, and extended-service areas may require an additional shipping charge. We will contact you before shipping if an adjustment is necessary.

Directions

• Confirm the installation location provides suitable floor support, delivery access, and maintenance clearance for the filled aquarium, cabinet, equipment, and aquascaping materials.
• Assemble and level the black anodized aluminum cabinet according to Red Sea's instructions before positioning the glass aquarium. Arrange appropriate lifting assistance for the heavy glass display.
• Install the REEF-SPEC sump and supplied drain and return plumbing, including the ReefGate valve, ensuring all seals and connections are properly seated.
• Position the ReefControl Pro Controller and ATO Module, connect the digital level and temperature sensor and top-off pump, and provide a suitable freshwater reservoir.
• Arrange the slide-out control panel so that electrical connections, dosing lines, and any additional monitoring equipment remain accessible for servicing.
• Install the selected return pump, lighting, skimmer, heating, and circulation equipment. Adjust the skimmer chamber depth between 21 and 27 cm to suit the skimmer's operating requirements.
• Follow the manufacturer initial-fill and leak-inspection procedure. Tune the ReefGate valve gradually, allowing the overflow level to stabilize between adjustments.
• Perform a power-out test to confirm the sump can accommodate drain-back water when return circulation stops.
• Maintain the filter bags, media cups, overflow combs, and ATO level sensor as required. Establish biological filtration before introducing marine livestock.
• Register the aquarium with Red Sea within 90 days of purchase to qualify for the extended warranty.

What's Included

• REEFER S-550 G3+ eurobraced ultra-clear glass aquarium with additional bottom bracing
• Black marine-spec anodized aluminum cabinet superstructure with replaceable panels and hidden adjustable leveling feet
• Slide-out equipment control panel
• 101 litre REEF-SPEC glass sump with adjustable-height skimmer chamber and removable ReefMat-ready mechanical filtration compartment
• Two 225-micron mechanical filter bags
• Two filter media cups
• Downflow and dual return plumbing with ReefGate precision valve
• Central overflow with removable surface-skimming combs
• Two curved 25 mm return outlets
• ReefControl Pro Controller
• ReefControl ATO Module with digital level and temperature sensor and DC top-off pump