Red Sea Reefer S-550 G3+ - White Cabinet

Red Sea Reefer S-550 G3+ - White Cabinet

The Red Sea Reefer S-550 G3+ - White Cabinet is a 549 litre (145.1 US gallon) reef-ready aquarium system built around a 448 litre (118.4 gallon) eurobraced ultra-clear glass display, a 101 litre (26.7 gallon) REEF-SPEC filtration sump, and a white cabinet with a marine-spec anodized aluminum superstructure. Designed for aquarists who want a premium four-foot reef with substantial front-to-back depth, the S-550 provides a 120 x 68 cm (47.2 x 26.8 inch) footprint for layered aquascaping and independently selected equipment.

The S-550 G3+ includes Red Sea's ReefControl Pro Controller and ReefControl ATO Module for automatic freshwater top-off and connected temperature monitoring. The cabinet features replaceable white exterior panels, concealed adjustable feet, and a slide-out control panel, while the aquarium incorporates 19 mm ultra-clear front glass, perimeter and bottom bracing, dual curved returns, and ReefGate precision drainage. Its ReefMat-ready sump includes an adjustable-height skimmer chamber and optional refugium-divider compatibility.

Red Sea Reefer S-550 G3+ - White Cabinet Design

• Deep four-foot aquarium: The 120 cm (47.2 inch) length and 68 cm (26.8 inch) front-to-back width provide room to create separated rock islands, swimming channels, and coral areas without requiring a five- or six-foot installation.
• 19 mm ultra-clear front panel: The substantial low-iron viewing glass helps reduce unwanted tint, preserving the appearance of fish, coral colours, and aquascaping details.
• Reinforced glass construction: Eurobracing, additional bottom bracing, and high-quality euro-silicone provide structural reinforcement appropriate for the larger REEFER-S display format.
• White aluminum superstructure: The cabinet combines an anodized aluminum support frame with replaceable white panels for a bright furniture-style exterior.
• Hidden adjustable leveling feet: Concealed cabinet adjustments allow the stand to be correctly leveled before filling the aquarium without interrupting its exterior appearance.
• Separate sump filtration: Supporting equipment is located below the display so that the main aquarium remains available for livestock and aquascaping.

Aluminum Cabinet Frame and Organized Equipment Access

The REEFER-S cabinet provides a different equipment-management arrangement from Red Sea's standard REEFER systems. Its anodized aluminum frame supports the aquarium, while replaceable panels and a slide-out control panel allow compatible electronics and supporting equipment to be arranged inside the cabinet.

• Rigid marine-spec aluminum support: The structural frame provides a robust foundation for the glass aquarium and the equipment housed below it.
• Replaceable white panels: The cabinet exterior can be serviced independently of the underlying aluminum superstructure.
• Slide-out control panel: A designated mounting surface provides organized access to compatible aquarium controllers, power equipment, and dosing hardware.
• Dedicated auxiliary equipment area: Cabinet space is provided for compatible chiller equipment and supporting accessories, subject to the dimensions and ventilation requirements of the selected devices.
• Service access: Separating electronics from the sump operating area can simplify equipment changes, cable routing, and routine maintenance.
• Marine-environment materials: Anodized aluminum, corrosion-resistant hardware, and splash-resistant finishes are used in the humid environment around a saltwater aquarium.

Included ReefControl Pro and ReefControl ATO Module

The S-550 G3+ incorporates Red Sea's ReefControl Pro platform rather than the older standalone ReefATO+ controller. The included ATO Module handles freshwater replenishment through ReefControl Pro, while the controller provides temperature monitoring and expansion options for additional compatible ReefSense devices.

• ReefControl Pro Controller: Supports up to seven compatible ReefSense probes or sensors and two 12V DC devices for selected monitoring and control applications.
• Digital top-off operation: The ATO Module uses a water-level sensor and DC pump to replace evaporated freshwater, helping maintain stable sump level and salinity.
• Integrated temperature readings: The digital ATO sensor incorporates aquarium temperature measurement and provides available notifications through ReefControl.
• ReefBeat connectivity: The connected platform provides access to compatible readings, operating history, alerts, and device settings.
• Expandable monitoring: Compatible ReefSense probes for pH, ORP, salinity, and other parameters may be added separately as needed.
• Additional control possibilities: Optional ReefControl Power can integrate supported AC devices with the wider ReefBeat equipment ecosystem.
• Equipment package distinction: ReefControl Pro and the ATO Module are included, while additional water-parameter probes, lighting, skimmer, return pump, and other MAX equipment are separate purchases.

Quiet Drainage with Dual 25 mm Return Outlets

The S-550 G3+ uses an enlarged surface-skimming overflow and hydrodynamically optimized plumbing to move water into the sump. A high-precision ReefGate valve allows the downflow to be regulated for quiet operation, while two curved outlets return filtered water to the display.

• Dual curved 25 mm (approximately 1 inch) returns: Both outlets can be supplied by one compatible return pump or by two separate pumps.
• Precision ReefGate valve: Fine drain adjustment helps maintain the correct overflow water level and reduce unwanted turbulence and noise.
• Enlarged rectangular downflow: The inlet is designed to reduce turbulence as water leaves the display and enters the plumbing.
• Removable overflow combs: Surface-skimming sections can be removed for cleaning to maintain unrestricted water collection.
• Hydrodynamic water path: The supplied pipework is designed to minimize unnecessary flow restrictions between the aquarium and sump.
• Connection compatibility: The new S-550 G3+ specifications list two 25 mm returns. Plumbing from earlier S-series generations should not be assumed interchangeable without checking its dimensions.

101 Litre Sump with Deeper Skimmer Adjustment

The 101 litre (26.7 gallon) REEF-SPEC sump contains removable mechanical filtration, a skimmer chamber with adjustable operating depth, and return circulation space. Its 21-27 cm (8.3-10.6 inch) adjustable skimmer range is an important distinction from standard REEFER G3+ systems.

• Two 225-micron filter bags: The supplied mesh filters capture suspended debris entering the sump and can be removed for cleaning.
• Two filter media cups: The mechanical filtration compartment includes cups that provide alternative filtration arrangements.
• ReefMat-ready filtration: The removable mechanical filtration section can be replaced with compatible automatic fleece filtration without changing the standard plumbing layout.
• ReefMat 1200 compatibility: Red Sea specifies the ReefMat 1200 for the corresponding MAX S-550 G3+ configuration, providing a manufacturer-listed upgrade option.
• Adjustable skimmer water depth: A 21-27 cm (8.3-10.6 inch) range allows compatible skimmers to operate at the water level required for their design.
• Optional refugium divider: A compatible partition allows a dedicated refugium area to be planned inside the main sump.
• No extension sump: The S-550 uses a single sump. A separate glass extension sump is reserved for the larger S-850 and S-1000 G3+ models.

Equipment Planning and Model Comparisons

The REEFER S-550 G3+ is intended for aquarists who want to customize a premium marine fish or coral aquarium while retaining Red Sea's integrated water-management and controller infrastructure. The choice between the S-550 and S-700 is primarily about the required display length and sump capacity, rather than different included ReefControl hardware.

• Return pump reference: Red Sea specifies one ReefRun G2 8000 for the MAX S-550 G3+. It is not included with the standard reef-ready system.
• Lighting reference: The equivalent MAX package uses two ReefLED G2 170 fixtures. Lighting should be selected for the 120 x 68 cm (47.2 x 26.8 inch) footprint and the needs of the planned corals.
• Protein skimmer reference: Red Sea pairs the MAX S-550 with an RSK DC 600. Alternative skimmers should be checked for fitment and compatibility with the deeper 21-27 cm skimmer chamber.
• Circulation planning: The corresponding MAX package uses two ReefWave 45 pumps. Dedicated wavemakers can complement the dual returns and move water behind aquascaping structures.
• ATO freshwater supply: A suitable freshwater reservoir is required for the included top-off pump. Consider where the reservoir will sit before arranging other cabinet equipment.
• S-550 versus S-700: Both have 68 cm display depth, 65 cm height, 19 mm front glass, aluminum cabinets, ReefControl Pro, and two 25 mm returns. The S-700 adds 30 cm (11.8 inches) of display length and 116 litres (30.6 gallons) of display volume.

Red Sea Reefer S-550 G3+ White Specifications

• Total system volume: 549 L / approximately 145.1 US gal.
• Display volume: 448 L / approximately 118.4 US gal.
• 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 system height including cabinet: 153 cm / approximately 60.2 inches.
• Front viewing glass: 19 mm ultra-clear glass / approximately 0.75 inches.
• Glass reinforcement: Eurobracing with additional bottom bracing and high-quality euro-silicone bonding.
• Cabinet construction: White exterior panels over a marine-spec anodized aluminum superstructure with hidden adjustable leveling feet.
• Cabinet equipment features: Slide-out control panel and separate auxiliary equipment space.
• Return connections: Two curved 25 mm outlets for single- or dual-pump setups.
• Mechanical filtration: Removable ReefMat-ready section with two 225-micron filter bags and two media cups.
• Skimmer chamber operating depth: Adjustable 21-27 cm / approximately 8.3-10.6 inches.
• Refugium: Optional sump-divider arrangement.
• Included controller: ReefControl Pro with up to seven compatible ReefSense probe or sensor connections and two 12V DC device connections.
• 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 roller filtration: ReefMat 1200, sold separately.
• Warranty: Standard 3 years, extendable to 5 years at no additional charge when registered within 90 days of purchase, subject to manufacturer 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 suitable floor support and access for the fully loaded aquarium, cabinet, water, rockwork, and equipment before assembly.
• Assemble and level the white aluminum-superstructure cabinet according to the manufacturer instructions. Arrange suitable lifting assistance before placing the glass aquarium on the cabinet.
• Install the sump, ReefGate valve, overflow, and dual return plumbing, ensuring all fittings and seals are correctly seated.
• Mount the ReefControl Pro Controller and install the ATO Module's digital sensor and pump according to Red Sea's instructions. Supply a suitable freshwater reservoir.
• Use the slide-out control panel to organize compatible controllers, power equipment, and dosing hardware while maintaining access for servicing.
• Select and install the return pump, skimmer, lighting, heating, and wavemakers. Adjust the skimmer chamber water depth to suit the chosen skimmer's specified operating range.
• Follow the manufacturer initial-fill and plumbing leak-check procedure. Tune the ReefGate valve in small increments and allow the overflow level to stabilize between adjustments.
• Perform a power-out test to ensure the sump has sufficient reserve capacity when return circulation stops.
• Maintain the mechanical filters, overflow combs, and ATO sensor regularly. Establish biological filtration before adding fish or corals.
• Register the aquarium within 90 days of purchase to qualify for the extended manufacturer warranty.

What's Included

• REEFER S-550 G3+ eurobraced ultra-clear glass aquarium with additional bottom bracing
• White marine-spec anodized aluminum cabinet superstructure with replaceable panels and hidden leveling feet
• Slide-out equipment control panel
• 101 litre REEF-SPEC 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 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