Red Sea Reefer 750 G3 - White Cabinet

The Red Sea Reefer 750 G3 - White Cabinet is a premium 750 litre / 198.1 gallon reef-ready aquarium and cabinet system that pairs the largest classic REEFER G3 display with a bright white marine-spec cabinet.

This 180 cm flagship-size base REEFER G3 system is built for aquarists who want a serious large reef foundation with Red Sea’s euro-braced ultra-clear glass display, white reinforced cabinet, REEF-SPEC sump, glass extension sump, ReefMat-ready mechanical filtration, integrated ReefATO+, ReefGate precision drain control, central surface-skimming overflow, and dual-return plumbing. Lighting, return pumps, skimmer, heater, wavemakers, livestock, rock, sand, salt, and optional filtration upgrades are selected separately for a fully customized reef build.

Red Sea REEFER 750 G3 White Reef System

• Flagship classic REEFER size: The REEFER 750 G3 offers the largest footprint in the standard REEFER G3 lineup, making it a strong choice for serious home and display reef installations.
• 198.1 gallon total volume: The 750 L system provides the scale and stability needed for a mature reef with larger coral colonies and more advanced equipment planning.
• White cabinet finish: The white marine-spec cabinet creates a bright, clean, modern look that helps the large aquarium feel polished and architectural.
• Custom equipment freedom: This base system lets customers choose the return pumps, reef lighting, skimmer, heater, wavemakers, and automation equipment they prefer.
• Euro-braced large display: The thick ultra-clear glass and euro-braced format provide a reinforced structure for the 180 cm aquarium.
• Large-system sump flexibility: The included sump and extension sump create more planning room for filtration, dosing, probes, reactors, and long-term reef support equipment.

180 cm Ultra-Clear Display with White Cabinet

• 600 litre display volume: The main aquarium provides substantial room for coral growth, fish movement, rock structures, open sand, and long-term reef development.
• 180 x 65 x 60 cm dimensions: The 70.9 inch length and 65 cm depth give aquarists a broad reef canvas for large aquascapes and multiple coral zones.
• 19 mm glass build: The REEFER 750 G3 is listed with 19 mm front, side, bottom, and back glass.
• Ultra-clear low-iron viewing: The thick glass panels are designed for clean viewing and reduced tint across the large display.
• Euro-braced strength: The bracing supports the large aquarium structure while maintaining a professional top profile.
• Bright cabinet presentation: The white cabinet visually lightens the largest REEFER G3 and suits modern rooms, offices, and showroom-style installations.

G3 Water Management for a Long Reef Display

• Optimized circulation architecture: REEFER G3 systems use improved plumbing and flow design to move water more efficiently through the aquarium and sump.
• Quiet downflow inlet: The enlarged rectangular drain inlet helps reduce turbulence and operating noise.
• ReefGate valve control: Fine drain adjustment allows the overflow and sump level to be tuned for quiet stable operation.
• Surface-skimming overflow: The central overflow with removable surface skimmer helps manage surface film and display water clarity.
• Dual return design: The 750 is planned around dual returns, helping distribute return flow across the long aquarium when matched with the proper pumps.
• Clean plumbing layout: Pre-assembled downflow and return plumbing keeps installation more organized and predictable.

High-Capacity Sump and Extension Sump

• 150 litre sump volume: The sump system provides extensive room for filtration equipment, skimmer selection, return pumps, media, reactors, dosing lines, probes, and service access.
• Glass extension sump included: The REEFER 750 G3 includes a glass extension sump for additional filtration and equipment flexibility.
• ReefMat-ready mechanical chamber: The mechanical filtration area includes micron socks and media cups and is designed for optional Red Sea ReefMat installation.
• Integrated ReefATO+: ReefATO+ helps stabilize water level and salinity and provides temperature monitoring and leak detection.
• Large-reef filtration flexibility: The sump layout can support skimming, automatic mechanical filtration, carbon, reactors, refugium-style planning, dosing, and controller hardware.
• Built for serious reef systems: The 750 gives advanced aquarists the space needed to build a clean, automated, large reef aquarium around their preferred equipment.

White Cabinet with Aluminum Front Supports

• Marine-spec plywood cabinet: The cabinet is designed for aquarium use with moisture-resistant construction, leveling feet, stainless steel hinges, and a clean white finish.
• Front aluminum supports: The long cabinet span is reinforced with front aluminum supports for added structural rigidity.
• Large equipment compartment: The cabinet provides room for the sump, extension sump, dual return planning, dosing containers, probes, power management, and future equipment upgrades.
• Bright large-system look: The white finish softens the visual mass of the 180 cm aquarium and fits well in contemporary interiors.
• Purpose-built stand: The matching cabinet is designed for the tank footprint and loaded system weight.
• Professional display finish: The white 750 G3 has the size and polish to act as a major room feature or premium showroom reef system.

Red Sea Reefer 750 G3 White Specifications

• Total system volume: 750 L / 198.1 gal.
• Display volume: 600 L / 158.5 gal.
• Sump volume: 150 L / 39.6 gal.
• Display dimensions: 180 cm L x 65 cm W x 60 cm H / approx. 70.9 x 25.6 x 23.6 in.
• Total height with cabinet: 148 cm / approx. 58.3 in.
• Glass thickness: 19 mm front glass, 19 mm side glass, 19 mm bottom glass, and 19 mm back glass.
• Display format: Euro-braced ultra-clear glass aquarium.
• Cabinet: White marine-spec plywood cabinet with leveling feet and front aluminum supports.
• Filtration: REEF-SPEC sump with mechanical chamber, micron socks, media cups, glass extension sump, ReefMat-ready layout, and ReefATO+.
• Recommended return pump: Dual returns with 2 x Red Sea ReefRun G2 12000, sold separately.
• Lighting: Sold separately and should be selected for full 180 cm x 65 cm reef coverage.

Application Notes for the REEFER 750 G3 White

• Best use: Ideal for large mixed reefs, SPS-capable coral systems, LPS displays, soft coral aquariums, and premium long-format showpiece reef installations.
• Return planning: This model is designed around dual return flow and should be planned with appropriate return pumps before setup.
• Lighting planning: Use a multi-fixture lighting plan that covers the full 180 cm length and 65 cm depth based on coral goals.
• Flow planning: Dedicated wavemakers are needed for strong reef circulation beyond the return outlets.
• Filtration planning: The sump and extension sump provide strong flexibility for automatic mechanical filtration, skimming, reactors, dosing, and monitoring equipment.
• Not included: Lighting, return pumps, protein skimmer, heater, wavemakers, livestock, rock, sand, salt, optional ReefMat, dosing equipment, and test kits are sold separately unless otherwise stated.

Red Sea REEFER G3 Series Video

Setup and Installation Notes

• Assemble and level the cabinet: Build the white cabinet according to Red Sea’s instructions and confirm it is level before placing the aquarium.
• Plan equipment before filling: Select dual return pumps, lighting, skimmer, heater, wavemakers, and automation hardware before adding water or rock.
• Install all sump components: Confirm the overflow, downflow, ReefGate valve, dual returns, sump, extension sump, and ReefATO+ are installed correctly.
• Leak test with freshwater: Run the system with freshwater first to verify plumbing, sump operation, and return flow.
• Tune the ReefGate slowly: Adjust the downflow valve in small increments until the overflow and sump run quietly.
• Use RO/DI water: RO/DI water is recommended for saltwater mixing and top-off.
• Cycle before stocking: Establish biological filtration before adding fish or corals, then stock gradually for long-term stability.

What’s Included

• Euro-braced ultra-clear glass aquarium
• White marine-spec plywood cabinet with leveling feet and front aluminum supports
• REEF-SPEC sump with mechanical chamber, micron socks, and media cups
• Glass extension sump
• Pre-assembled downflow and return plumbing with ReefGate precision valve
• Central overflow with removable surface skimmer
• Curved dual return nozzles
• Integrated ReefATO+ sensors and controller

Shipping Notes

• This item is exempt from our free shipping policy.
• To avoid delays, please order Red Sea aquariums by themselves. If you are wishing to order multiple things, please place two separate orders: one for the aquarium and one for the rest of your products.
• Please call for a shipping quote if ordering from NWT, YK, or NUN.
• All Red Sea aquariums are brought in and shipped out on an as-ordered basis. The average turn-around time to ship an aquarium to you is two business days, except where noted below.
• All shipments outside of the Vancouver area are shipped via trucking company with residential and power tailgate delivery, and are fully insured.
• Tanks ordered within BC and, in some circumstances, Alberta may take an extra 5-10 business days to process. Systems ordered from Alberta and east of there usually ship within two business days direct from the distributor in Ontario.
• If you are ordering for pick-up from our store, please select in-store pickup to avoid delivery charges. You will be notified when the tank arrives, usually within 5-10 business days.
• Red Sea Max S Series aquariums are always special order and will take from 3-6 weeks to ship.
• Please note the freight company is only responsible for getting the aquarium to the destination address and off-loading it. They are not responsible for carrying it inside.
• All freight charges have been greatly subsidized to help you get up and running with your new Red Sea system.