Red Sea Reefer 750 G3+ - White Cabinet

Red Sea Reefer 750 G3+ - White Cabinet

The Red Sea Reefer 750 G3+ - White Cabinet combines a 600 litre (158.5 US gallon) eurobraced ultra-clear glass aquarium with a 150 litre (39.6 gallon) split-sump filtration system, a reinforced white marine-spec plywood cabinet, and integrated ReefControl Pro automation. With a total system volume of 750 litres (198.1 US gallons), this six-foot reef-ready aquarium provides substantial space for elaborate rockwork, mature coral colonies, open swimming areas, and a customized filtration and circulation system.

The REEFER 750 G3+ is the largest standard-format REEFER in the G3+ range. It features 19 mm ultra-clear front glass, perimeter and bottom bracing, aluminum cabinet supports, an enlarged central overflow, and dual 32 mm return outlets for higher water-flow capacity. Its unique split-sump arrangement offers more filtration flexibility than smaller REEFER systems, while the included ReefControl Pro Controller and ReefControl ATO Module provide automatic top-off, temperature monitoring, and connections for future aquarium automation. Lighting, return pump, protein skimmer, wavemakers, and additional equipment are selected separately.

Red Sea Reefer 750 G3+ White Glass and Cabinet Construction

• 180 cm (70.9 inch) display length: The six-foot aquarium provides room for multiple reef structures, separated coral gardens, and open swimming channels, allowing a more expansive aquascape than the five-foot REEFER 625 G3+.
• 65 cm (25.6 inch) front-to-back width: The generous aquascaping depth supports rock islands, branching coral structures, and open sand areas while leaving space around the rockwork for circulation and cleaning.
• 600 litre (158.5 gallon) display volume: The main aquarium provides a substantial viewing area for a planned marine fish or coral display, with the filtration equipment located beneath the tank.
• 19 mm (0.75 inch) ultra-clear front glass: The low-iron viewing panel reduces unwanted glass tint across the large aquarium and is combined with Red Sea's reinforced G3+ glass construction.
• Perimeter eurobracing and bottom bracing: The aquarium incorporates 15 mm (0.59 inch) jet-black upper eurobracing, additional bottom reinforcement, and high-quality euro-silicone bonding.
• White reinforced marine-spec cabinet: The plywood stand includes aluminum front supports, moisture-resistant laminated panels, splash-resistant epoxy-painted doors, stainless steel hinges, and adjustable leveling feet.
• Aluminum-supported floating design: A discreet aluminum support edge provides a reinforced transition between the aquarium and the white cabinet while maintaining Red Sea's distinctive visual separation.

High-Flow Dual Returns and Quiet ReefGate Plumbing

The REEFER 750 G3+ uses larger return plumbing than the REEFER 625 G3+. Its two curved 32 mm outlets and enlarged central overflow are designed for higher circulation capacity, with hydrodynamically optimized piping and a precision ReefGate valve providing control over the water travelling between the display and sump.

• Two curved 32 mm (approximately 1.26 inch) return outlets: The dual connections support one compatible return pump or two separate pumps and provide two points for distributing water into the long aquarium.
• Up to 9,000 L/h (approximately 2,400 US gph) flow capacity: Red Sea specifies this upper capacity for the 750 G3+ return and overflow arrangement, helping customers plan suitable return circulation equipment.
• ReefGate high-precision valve: Small adjustments regulate the main downflow, allowing the operating water level inside the overflow to be balanced against the return pump system for near-silent operation.
• Enlarged rectangular downflow inlet: The redesigned drain entrance reduces turbulence as water travels from the overflow into the sump plumbing.
• Expanded surface-skimming overflow: The central overflow collects aquarium surface water through removable combs, with an enlarged overflow arrangement designed for the higher-flow system.
• Removable overflow combs: Individual sections can be cleaned to remove deposits and accumulated debris that could restrict surface-water collection.
• Primary and secondary drainage: The downflow system incorporates a regulated main pipe and secondary bypass as part of its water-management arrangement.
• Hydrodynamic piping: Factory-designed plumbing minimizes unnecessary flow restrictions, with metric and imperial connection options available for compatible customized installations.

Split-Sump Filtration with Glass Extension Sump

The REEFER 750 G3+ incorporates a split-sump filtration system rather than the simpler single-sump layout found on smaller REEFER models. The main REEF-SPEC sump and glass extension sump provide a combined published sump volume of 150 litres (39.6 US gallons), giving aquarists additional flexibility when planning skimming, mechanical filtration, return circulation, and compatible supplementary filtration equipment.

• 150 litre (39.6 gallon) combined sump volume: The larger filtration system provides separate space for essential filtration and supporting equipment beneath the aquarium.
• Glass extension sump: The separate extension adds flexibility for arranging compatible additional filtration equipment and accessories within the cabinet.
• Adjustable skimmer chamber: The operating water depth can be set from 17 to 23 cm (6.7-9.1 inches), allowing compatible protein skimmers to operate at their specified water level.
• Two 225-micron mechanical filter bags: The supplied fine-mesh bags collect suspended particles entering the sump and can be removed for routine maintenance.
• Two filter media cups: The mechanical filtration compartment includes two cups for alternative filtration arrangements.
• ReefMat-ready compartment: The removable mechanical filtration assembly can be converted to compatible automatic roller filtration without rebuilding the aquarium's standard drain plumbing.
• Optional ReefMat 1200: Red Sea specifies the ReefMat 1200 for the corresponding MAX 750 G3+ configuration, providing an identified automatic mechanical filtration upgrade.
• Refugium compatibility: The filtration arrangement supports optional refugium planning for aquarists who wish to incorporate additional biological filtration or nutrient-management methods.

ReefControl Pro Automation and ATO Module

The REEFER 750 G3+ includes Red Sea's ReefControl Pro Controller and ReefControl ATO Module, providing automatic freshwater replacement and temperature monitoring as standard features. ReefControl Pro also allows additional compatible probes, sensors, and controlled equipment to be added later, making it suitable for customers planning a more extensively monitored large reef.

• ReefControl Pro Controller: Supports up to seven compatible ReefSense digital probes or sensors and two 12V DC devices, providing expansion capacity for additional aquarium monitoring.
• Digital freshwater top-off: The included ReefControl ATO Module monitors sump water level and activates its dedicated DC pump to replace freshwater lost through evaporation.
• Temperature monitoring: The digital ATO level sensor incorporates a temperature sensor, providing readings, monitoring history, and notifications through the connected controller.
• Complete ATO installation hardware: The module includes its digital level and temperature sensor, mounting bracket, DC top-off pump, silicone tubing, tube holder, and siphon breaker.
• ReefBeat ecosystem: Compatible monitoring devices can provide readings, notifications, history, and available equipment-control settings through Red Sea's ReefBeat platform.
• Optional ReefSense expansion: Compatible pH, salinity, ORP, and additional monitoring probes can be selected separately according to the requirements of the aquarium.
• Additional control equipment: Compatible ReefControl Power hardware can extend control to connected AC devices, complementing the Pro controller's monitoring and DC outputs.
• Standard package distinction: ReefControl Pro and the ATO Module are included, while the additional ReefSense pH and temperature probe and other hardware supplied with MAX equipment packages are separate purchases for this base aquarium.

Choosing Equipment for a Large Custom Reef

The REEFER 750 G3+ can be configured for a substantial marine fish aquarium, soft coral and LPS display, or an appropriately equipped mixed reef. Its long display, split-sump filtration, and dual return plumbing require a deliberate equipment plan, particularly when selecting lighting, return circulation, protein skimming, and supplementary water movement.

• Recommended return pump: Red Sea specifies one ReefRun G2 8000 for the equivalent MAX 750 G3+ configuration. The pump is sold separately with this standard reef-ready system.
• Return circulation planning: The dual 32 mm outlets offer higher flow capacity than the 625's 25 mm connections. Actual return flow depends on the selected pump, plumbing resistance, and installation head height.
• Lighting reference: The corresponding MAX 750 G3+ uses three ReefLED G2 170 fixtures. Customers may select other compatible lighting suited to the full 180 x 65 cm (70.9 x 25.6 inch) footprint and the intended coral species.
• Protein skimmer selection: Red Sea specifies the RSK DC 900 for the MAX package. Alternative skimmers should fit the sump and operate within the adjustable 17-23 cm (6.7-9.1 inch) water-depth range.
• Additional water movement: Red Sea specifies two ReefWave 45 pumps for the MAX configuration. Independently selected wavemakers should provide circulation around the larger rockwork and coral colonies beyond the flow supplied by the returns.
• Freshwater reservoir planning: The included ATO Module requires a suitable freshwater supply. Plan the reservoir location, tubing route, and refilling access around the other cabinet equipment.
• Filtration equipment layout: The main and extension sumps provide more options for arranging compatible mechanical filtration, skimming, media equipment, monitoring probes, and additional filtration components.
• Installation considerations: Confirm the available floor space, structural support, delivery access, and safe handling arrangements before purchasing and assembling this large aquarium system.

REEFER 750 G3+ White Versus Other Large REEFER Models

• Largest standard-format G3+: The 750 provides a 180 cm (70.9 inch) display without moving into Red Sea's separate REEFER-S premium aquarium format.
• More volume than the 625: The 750 has 130 litres (34.3 US gallons) more total system capacity, including a 600 litre display compared with 497 litres on the 625.
• Additional aquascaping length: The display is 30 cm (11.8 inches) longer than the 625 while retaining the same 65 cm (25.6 inch) front-to-back depth and 60 cm (23.6 inch) height.
• Different sump configuration: The 750 uses a split-sump arrangement with a glass extension and 150 litres (39.6 gallons) of combined sump volume, compared with the 625's 123 litre (32.5 gallon) single sump.
• Larger return connections: Dual 32 mm returns provide greater circulation capacity than the dual 25 mm outlets on the 625.
• Matching smart control platform: Both models include ReefControl Pro and the ReefControl ATO Module, so choosing the 750 primarily adds physical space, larger return plumbing, and split-sump flexibility rather than a different included controller.
• Cabinet colour choice: The white and black REEFER 750 G3+ systems share the same aquarium dimensions, sump arrangement, plumbing, and ReefControl hardware. The cabinet finish is the principal difference.

Red Sea Reefer 750 G3+ White Specifications

• Total system water volume: 750 L / approximately 198.1 US gal.
• Display aquarium volume: 600 L / approximately 158.5 US gal.
• Split-sump filtration volume: 150 L / approximately 39.6 US gal.
• Display dimensions: 180 cm L x 65 cm W x 60 cm H / approximately 70.9 x 25.6 x 23.6 inches.
• Total height including cabinet: 148 cm / approximately 58.3 inches.
• Ultra-clear front glass thickness: 19 mm / approximately 0.75 inches.
• Perimeter eurobracing: 15 mm / approximately 0.59 inches.
• Glass construction: Ultra-clear glass with eurobracing, additional bottom bracing, and high-quality euro-silicone bonding.
• Cabinet: White reinforced marine-spec plywood with aluminum front supports, moisture-resistant finishes, stainless steel hinges, and adjustable leveling feet.
• Return outlets: Two curved 32 mm connections for single- or dual-pump arrangements.
• Maximum specified return-flow capacity: Up to 9,000 L/h / approximately 2,400 US gph.
• Filtration system: REEF-SPEC split-sump system with main sump and glass extension sump.
• Mechanical filtration: Removable ReefMat-ready compartment with two 225-micron filter bags and two media cups.
• Skimmer chamber operating depth: Adjustable from 17-23 cm / approximately 6.7-9.1 inches.
• Refugium compatibility: Optional dedicated refugium 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, DC pump, and installation accessories.
• Recommended return pump: ReefRun G2 8000, sold separately.
• Optional automatic filtration: ReefMat 1200, sold separately.
• Manufacturer warranty: Standard 3 years, with an additional 2 years of structural coverage for the glass aquarium and cabinet available at no charge upon registration 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

• Choose an installation location with appropriate structural support for the fully loaded aquarium, cabinet, filtration equipment, and rockwork. Confirm available floor space, delivery access, and maintenance clearance before assembly.
• Assemble and level the white marine-spec cabinet, including its aluminum front supports, according to Red Sea's installation instructions. Arrange suitable lifting equipment and sufficient assistance to position the glass aquarium.
• Install the main sump, glass extension sump, overflow, ReefGate valve, and supplied downflow and return plumbing according to the manufacturer's instructions.
• Mount the ReefControl Pro Controller and connect the ATO Module, digital level and temperature sensor, top-off pump, tubing, tube holder, and siphon breaker as directed.
• Provide a suitable freshwater reservoir and arrange access for refilling and routine top-off pump maintenance.
• Install the selected return pump configuration, protein skimmer, lighting, heating, and additional circulation equipment. Adjust the skimmer chamber water depth to suit the chosen protein skimmer.
• Follow Red Sea's initial-fill procedure and inspect the plumbing connections for leaks before starting normal operation.
• Adjust the ReefGate valve gradually after starting the return pump, allowing the overflow water level to stabilize between adjustments.
• Perform a power-out test to ensure the split-sump filtration system can accommodate water draining from the display when return circulation stops.
• Clean the mechanical filters, overflow combs, return outlets, and ATO level sensor regularly to maintain unrestricted water movement and reliable operation.
• Register the aquarium with Red Sea within 90 days of purchase to qualify for the extended structural warranty.

What's Included

• REEFER 750 G3+ eurobraced ultra-clear glass aquarium with additional bottom bracing
• White reinforced marine-spec plywood cabinet with aluminum front supports, adjustable leveling feet, and stainless steel hinges
• REEF-SPEC split-sump filtration system with main sump, glass extension sump, adjustable-height skimmer chamber, and removable ReefMat-ready mechanical filtration compartment
• Two 225-micron mechanical filter bags
• Two filter media cups
• Downflow and 32 mm return plumbing with ReefGate precision valve
• Enlarged central overflow with removable surface-skimming combs
• Two curved 32 mm return outlets
• ReefControl Pro Controller
• ReefControl ATO Module with digital level and temperature sensor, DC top-off pump, and installation accessories