Red Sea Reefer 350 G3 - White Cabinet

The Red Sea Reefer 350 G3 - White Cabinet is a premium 342 litre / 90.3 gallon reef-ready aquarium and cabinet system that gives aquarists the largest rimless classic REEFER G3 display with a clean white marine-spec cabinet.

Designed for hobbyists who want a longer reef display while preserving the open rimless look, the REEFER 350 G3 combines a 120 cm ultra-clear glass aquarium, white marine-spec plywood cabinet, REEF-SPEC sump, ReefMat-ready mechanical filtration chamber, pre-assembled plumbing, ReefGate precision valve, surface-skimming overflow, curved dual return nozzles, and integrated ReefATO+ smart top-off control. It is a refined base platform for a custom reef aquarium where the final light, pump, skimmer, heater, flow, and automation choices stay in the customer’s control.

Red Sea REEFER 350 G3 White Reef System

• Largest rimless G3 format: The 350 is the largest rimless model in the classic REEFER G3 lineup before the range moves into euro-braced displays.
• 120 cm display length: The longer display creates better room for natural fish movement, coral spacing, and broader aquascape design.
• White cabinet finish: The white marine-spec cabinet gives the aquarium a bright, modern look that works well in contemporary homes, offices, and display spaces.
• Base-system flexibility: Return pump, skimmer, lighting, heater, wavemakers, dosing, and monitoring equipment are chosen separately for a tailored reef build.
• Sump-based platform: The included REEF-SPEC sump gives more equipment flexibility than compact all-in-one rear chambers.
• Strong long-term size: The 350 offers enough volume and display space for a mature reef while remaining more manageable than larger 5 foot and 6 foot systems.

Long Ultra-Clear Display with White Cabinet Styling

• 273 litre display volume: The main display gives reef keepers more room for coral growth, selected fish, and a more open reefscape.
• 120 x 50 x 53 cm footprint: The longer format supports reef ridges, islands, swimming lanes, and wider coral gardens.
• Reinforced rimless glass specification: The model is listed with 12 mm front glass, 15 mm side glass, and 12 mm bottom glass.
• Ultra-clear glass: Low-iron panels improve viewing clarity and reduce tint so coral and fish colour show more accurately.
• Bright furniture-style appearance: The white cabinet visually lightens the system and helps it blend into modern interiors.
• Clean display focus: Sump equipment sits below the tank, keeping the visible display free of bulky filtration hardware.

G3 Silent Downflow and Improved Water Return

• Improved hydrodynamic system: REEFER G3 plumbing is redesigned for stronger circulation and improved efficiency.
• Quiet rectangular downflow: The enlarged drain inlet helps reduce turbulence and supports quieter operation.
• ReefGate flow valve: The precision valve allows fine-tuning of the drain line to stabilize the overflow and sump water level.
• Surface-skimming overflow: The central overflow includes a removable surface skimmer to help remove surface film.
• Curved dual return nozzles: The improved return outlets help distribute water back into the longer 120 cm display.
• Pre-assembled plumbing: Included downflow and return plumbing makes installation cleaner and more predictable than a fully custom plumbing layout.

REEF-SPEC Sump and ReefATO+ Control

• 69 litre sump: The sump gives room for skimmer selection, return pump installation, mechanical filtration, media, dosing lines, probes, and optional upgrades.
• ReefMat-ready chamber: The mechanical filtration section includes micron socks and media cups and can be upgraded with optional Red Sea ReefMat filtration.
• Integrated ReefATO+: ReefATO+ helps stabilize sump water level and salinity while also offering temperature monitoring and leak detection.
• Flexible filtration planning: The sump supports a variety of reef setups, from simple mixed reefs to more automated coral-focused systems.
• Maintenance access: Cabinet sump access makes skimmer service, filter maintenance, dosing, and equipment changes more practical.
• Expandable Red Sea ecosystem: The system pairs naturally with optional ReefRun, ReefLED, ReefMat, ReefWave, ReefDose, and ReefBeat-connected devices.

Red Sea Reefer 350 G3 White Specifications

• Total system volume: 342 L / 90.3 gal.
• Display volume: 273 L / 72.1 gal.
• Sump volume: 69 L / 18.2 gal.
• Display dimensions: 120 cm L x 50 cm W x 53 cm H / approx. 47.2 x 19.7 x 20.9 in.
• Total height with cabinet: 140 cm / approx. 55.1 in.
• Glass thickness: 12 mm front glass, 15 mm side glass, 12 mm bottom glass.
• Display format: Rimless ultra-clear glass aquarium.
• Cabinet: White marine-spec plywood cabinet with leveling feet.
• Filtration: REEF-SPEC sump with mechanical chamber, micron socks, media cups, ReefMat-ready layout, and ReefATO+.
• Recommended return pump: Red Sea ReefRun G2 6000, sold separately.
• Recommended lighting: Red Sea ReefLED G2 170, sold separately.
• Recommended ReefMat: Red Sea ReefMat 500, sold separately.

Application Notes for the REEFER 350 G3 White

• Best use: Ideal for aquarists who want a long rimless reef display for soft coral aquariums, LPS systems, mixed reefs, and more spacious coral layouts.
• Lighting selection: The recommended ReefLED G2 170 is sold separately, and light choice should match coral goals and desired spread.
• Return pump planning: The recommended ReefRun G2 6000 is sold separately and should be matched to sump turnover goals.
• Flow planning: Add wavemakers to create broad, adjustable reef flow across the 120 cm length.
• ReefMat path: The ReefMat-ready sump supports a future automatic filtration upgrade.
• Not included: Lighting, return pump, 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

• Build and level the cabinet: Assemble the white cabinet according to Red Sea’s instructions and confirm the system is level before filling.
• Choose core equipment first: Select return pump, skimmer, lighting, heater, and wavemakers before starting the reef.
• Install plumbing and sump equipment: Confirm the overflow, downflow, ReefGate valve, return plumbing, sump, and ReefATO+ are installed correctly.
• Freshwater leak test: Run the tank and sump with freshwater before final saltwater setup.
• Tune the ReefGate carefully: Make small adjustments until the drain and sump run smoothly and quietly.
• Use RO/DI water: Use RO/DI water for salt mixing and top-off to support stable reef chemistry.
• Cycle before stocking: Establish biological filtration fully before adding fish or corals.

What’s Included

• Ultra-clear rimless glass aquarium
• White marine-spec plywood cabinet with leveling feet
• REEF-SPEC sump with mechanical chamber, micron socks, and media cups
• 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.