Red Sea Reefer Peninsula 350 G3 - Black Cabinet

The Red Sea Reefer Peninsula 350 G3 - Black Cabinet is a premium 352 litre / 93.0 gallon reef-ready peninsula aquarium system designed for aquarists who want a compact room-divider reef display with Red Sea’s G3 water-management platform and a clean black marine-spec cabinet.

Built to be viewed from three sides, this peninsula-style REEFER system is ideal for open-concept spaces, living rooms, offices, and feature displays where the aquarium is meant to divide a room rather than sit flat against a wall. The system includes a rimless 15 mm ultra-clear glass aquarium, black marine-spec plywood cabinet, REEF-SPEC sump, ReefMat-ready mechanical chamber, micron socks, media cups, ReefGate precision valve, central overflow with removable surface skimmer, curved dual side returns, pre-assembled plumbing, and integrated ReefATO+ smart top-off control. Lighting, return pump, skimmer, heater, wavemakers, optional ReefMat, livestock, rock, sand, and salt are selected separately.

Red Sea REEFER Peninsula 350 G3 Black Room-Divider System

• Three-sided peninsula viewing: The Peninsula 350 G3 is designed to be viewed from both long sides and the end panel, creating a more immersive reef display than a standard wall-facing aquarium.
• Compact room-divider footprint: The 96 cm length makes it easier to place than larger peninsula tanks while still giving the reef a strong architectural presence.
• 352 litre total system volume: The 93.0 gallon system volume provides a stable foundation for a carefully planned reef aquarium.
• Black cabinet presentation: The black marine-spec cabinet creates a high-contrast look that helps coral colour, aquascape shape, and reef lighting stand out.
• Base-system flexibility: Return pump, lighting, skimmer, heater, flow pumps, dosing equipment, and automation can be chosen separately around the customer’s reef goals.
• G3 reef infrastructure: Hydrodynamic plumbing, quiet downflow design, ReefGate control, ReefATO+, and a ReefMat-ready sump give the system a strong modern Red Sea foundation.

Rimless Ultra-Clear Peninsula Display

• 278 litre display volume: The main display gives 73.4 gallons of reef space for coral placement, open sand areas, rock islands, swim-throughs, and selected reef fish.
• 96 x 63.5 x 60 cm dimensions: The generous 63.5 cm width gives the aquascape useful depth for a three-sided room-divider layout.
• 15 mm glass construction: The Peninsula 350 G3 uses 15 mm front, side, bottom, and back glass.
• Rimless ultra-clear format: Low-iron glass and the rimless top give the aquarium a clean premium look with excellent viewing clarity.
• Designed for island aquascapes: The layout is well suited to central rock structures, negative space, caves, open channels, and coral placement visible from multiple angles.
• Open-top access: The rimless design makes aquascaping, maintenance, feeding, and coral placement more convenient.

G3 Water Management and Peninsula Flow

• Hydrodynamically optimized piping: Red Sea’s G3 water path is designed for stronger, more efficient circulation through the overflow, sump, and return path.
• Low-turbulence downflow: The enlarged rectangular drain inlet helps reduce turbulence and supports quieter running once the system is tuned.
• ReefGate precision valve: The high-precision downflow valve allows fine control of the drain line for stable, near-silent overflow operation.
• Central overflow with surface skimmer: The overflow pulls surface water into the filtration path and helps reduce surface film.
• Curved dual side returns: The side return outlets help move water along the peninsula viewing pane and reduce dead zones when paired with proper wavemaker flow.
• Pre-assembled plumbing: The included pipework gives the system a clean factory-designed drain and return layout.

REEF-SPEC Sump and ReefATO+ Stability

• 74.6 litre sump volume: The sump gives dedicated space for mechanical filtration, skimmer selection, return equipment, media, probes, and maintenance access.
• ReefMat-ready mechanical chamber: The removable mechanical compartment includes micron socks and media cups and is designed for optional ReefMat installation.
• Integrated ReefATO+: ReefATO+ helps manage evaporation-driven water-level changes and salinity stability while adding temperature monitoring and leak detection.
• Flexible filtration planning: The sump can support skimming, carbon, media, dosing lines, monitoring probes, and future filtration upgrades.
• Cleaner equipment layout: The cabinet sump keeps filtration and support equipment below the display instead of crowding the reef view.
• Room-divider service access: The system should be positioned with enough room for cabinet, sump, plumbing, and glass maintenance from the appropriate sides.

Red Sea Reefer Peninsula 350 G3 Black Specifications

• Total system volume: 352 L / 93.0 gal.
• Display volume: 278 L / 73.4 gal.
• Sump volume: 74.6 L / 19.7 gal.
• Display dimensions: 96 cm L x 63.5 cm W x 60 cm H / approx. 37.8 x 25.0 x 23.6 in.
• Total height with cabinet: 160 cm / approx. 63.0 in.
• Glass thickness: 15 mm front glass, 15 mm side glass, 15 mm bottom glass, and 15 mm back glass.
• Display format: Rimless ultra-clear peninsula aquarium.
• Cabinet: Black marine-spec plywood cabinet with leveling feet.
• Filtration: REEF-SPEC sump with mechanical chamber, micron socks, media cups, ReefMat-ready layout, and integrated ReefATO+.
• Recommended return pump: Red Sea ReefRun G2 6000, sold separately.
• Recommended lighting: 2 x Red Sea ReefLED G2 115, sold separately.

Application Notes for the Peninsula 350 G3

• Best use: Ideal for room-divider reef aquariums, compact peninsula displays, LPS reefs, soft coral systems, and carefully planned mixed reefs.
• Equipment planning: Add a return pump, skimmer, lighting, heater, wavemakers, test kits, and optional automation before cycling.
• Peninsula aquascaping: Rockwork should look intentional from both long viewing sides, not just from one front-facing angle.
• Lighting planning: The recommended ReefLED G2 fixtures are sold separately, and lighting should be selected for full length and width coverage.
• Flow planning: Add wavemakers to supplement return flow and keep detritus from settling behind rock structures.
• 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 Peninsula G3 Series Video

Setup and Installation Notes

• Plan room placement first: Peninsula aquariums need space for viewing, cleaning, cabinet access, and safe movement around the exposed sides.
• Assemble and level the cabinet: Build the black cabinet according to Red Sea’s instructions and confirm it is level before placing the aquarium.
• Select equipment before filling: Choose the return pump, skimmer, lighting, heater, wavemakers, optional ReefMat, and controller layout before adding water.
• Install plumbing carefully: Confirm the overflow, downflow, ReefGate valve, return plumbing, sump, and ReefATO+ are correctly installed.
• Leak test with freshwater: Run the system with freshwater before final saltwater setup to verify plumbing, sump operation, and return flow.
• Tune the ReefGate gradually: Make small valve adjustments until the overflow and sump run quietly and consistently.
• 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.

What’s Included

• Rimless ultra-clear peninsula aquarium
• Black 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
• Dual curved side 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.