Red Sea Reefer Peninsula S-700 G3 - Black Cabinet

The Red Sea Reefer Peninsula S-700 G3 - Black Cabinet is a premium 705 litre / 186.2 gallon reef-ready peninsula aquarium system built for aquarists who want a large three-sided room-divider reef display with Red Sea’s reinforced REEFER-S G3 aluminum cabinet platform.

Designed for serious custom reef builds, the Peninsula S-700 G3 combines a 151 cm euro-braced 19 mm ultra-clear glass aquarium, black aluminum super-structure cabinet, replaceable panels, hidden adjustable feet, slide-out control panel, REEF-SPEC sump, ReefMat-ready mechanical chamber, micron socks, media cups, ReefGate precision valve, central overflow with removable surface skimmer, dual curved side return nozzles, pre-assembled plumbing, and integrated ReefATO+ smart top-off control. This is a base REEFER Peninsula S-Series system, so lighting, return pump, skimmer, heater, wavemakers, optional ReefMat, rock, sand, salt, livestock, and test kits are selected separately.

Red Sea REEFER Peninsula S-700 G3 Black Room-Divider System

• Large peninsula display: The 151 cm length and three-sided viewing format make this system ideal for open-concept rooms, offices, lobbies, and feature reef installations.
• 186.2 gallon total system volume: The 705 L system volume provides strong stability for a mature mixed reef, LPS display, soft coral system, or SPS-capable build with proper lighting and flow.
• Black aluminum super-structure cabinet: The rigid aluminum cabinet support and black exterior panels create a high-end room-divider installation with a bold modern finish.
• Premium REEFER-S upgrade: Compared with the standard Peninsula models, the S-700 adds the aluminum cabinet platform, slide-out control panel, deeper display proportions, and 19 mm glass.
• Custom equipment freedom: Customers can choose their preferred return pump, lighting, skimmer, heater, wavemakers, dosing, control, and filtration upgrades.
• G3 water-management foundation: ReefGate tuning, optimized plumbing, low-turbulence downflow, dual side returns, ReefATO+, and ReefMat readiness are built into the system.

151 cm Euro-Braced Ultra-Clear Peninsula Display

• 568 litre display volume: The main aquarium provides 150.0 gallons of display space for coral colonies, open sand areas, rock islands, swim-throughs, and carefully selected reef fish.
• 151 x 68 x 65 cm dimensions: The long and deep footprint gives aquascapers room for a central reef structure that looks finished from both long sides.
• 19 mm glass specification: The S-700 G3 uses 19 mm front, side, bottom, and back glass for a substantial premium display build.
• Euro-braced construction: The reinforced top frame supports the larger peninsula display while maintaining a clean professional appearance.
• Ultra-clear viewing: Low-iron glass improves clarity and helps coral colour, fish movement, and reef lighting show with less tint.
• Room-divider aquascaping: The display should be planned as a three-dimensional reef, not a one-sided rock wall, so both viewing sides look complete.

Black Aluminum Cabinet and Slide-Out Control Panel

• Aluminum super-structure: The cabinet uses a robust aluminum support frame for extra fortification on the long peninsula span.
• Replaceable black panels: The exterior panels create a finished black cabinet look while remaining part of the modular REEFER-S cabinet design.
• Hidden adjustable feet: Leveling feet help the system sit correctly on suitable flooring while keeping the cabinet profile clean.
• Slide-out control panel: The integrated panel provides a dedicated location for mounting controllers, power supplies, dosing hardware, and smart reef accessories.
• Clean equipment organization: The cabinet layout supports a more serviceable installation with sump equipment, ATO hardware, cables, and future upgrades contained below the display.
• High-contrast presentation: The black cabinet visually frames coral colour and reef lighting while keeping attention on the aquarium.

G3 Peninsula Flow and ReefGate Control

• Hydrodynamically optimized plumbing: The G3 water path is designed for stronger and more efficient flow through the overflow, sump, and return system.
• Quiet rectangular downflow: The low-turbulence drain inlet helps reduce operating noise when properly tuned.
• ReefGate precision valve: Fine drain adjustment allows the overflow and sump level to be tuned for quiet, stable performance.
• Central overflow: The removable surface skimmer helps pull surface film and floating debris into the filtration path.
• Dual curved side returns: Side-mounted returns help sweep water along the peninsula layout and improve distribution toward the far end of the display.
• Single or dual return planning: The plumbing layout gives flexibility for the recommended ReefRun G2 12000 return strategy, sold separately.

REEF-SPEC Sump and ReefATO+ Stability

• 136.7 litre sump volume: The sump gives generous space for skimmer selection, return equipment, mechanical filtration, media, probes, dosing lines, and maintenance access.
• ReefMat-ready chamber: The mechanical filtration section includes micron socks and media cups and is designed for optional Red Sea ReefMat 1200 installation.
• Integrated ReefATO+: ReefATO+ helps stabilize water level and salinity while adding temperature monitoring and leak detection.
• Flexible filtration planning: The sump can support skimming, carbon, reactors, refugium-style nutrient export, dosing, and monitoring equipment.
• Cleaner display area: Equipment is housed below the aquarium so the three-sided display remains focused on rockwork, coral, and fish.
• Long-term upgrade path: The system can start as a clean mixed reef and grow into a more automated Red Sea ecosystem over time.

Red Sea Reefer Peninsula S-700 G3 Black Specifications

• Total system volume: 705 L / 186.2 gal.
• Display volume: 568 L / 150.0 gal.
• Sump volume: 136.7 L / 36.1 gal.
• Display dimensions: 151 cm L x 68 cm W x 65 cm H / approx. 59.4 x 26.8 x 25.6 in.
• Total height with cabinet: 165 cm / approx. 65.0 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 peninsula aquarium.
• Cabinet: Black aluminum super-structure cabinet with replaceable panels, hidden adjustable feet, stainless hardware, and slide-out control panel.
• Filtration: REEF-SPEC sump with mechanical chamber, micron socks, media cups, ReefMat-ready layout, and integrated ReefATO+.
• Recommended return pump: Red Sea ReefRun G2 12000, sold separately.
• Recommended lighting: 3 x Red Sea ReefLED G2 170, sold separately.
• Recommended ReefMat: Red Sea ReefMat 1200, sold separately.

Application Notes for the Peninsula S-700 G3

• Best use: Ideal for large room-divider reefs, mixed reef aquariums, LPS systems, soft coral displays, and SPS-capable builds with proper equipment.
• Equipment planning: Add lighting, return pump, protein skimmer, heater, wavemakers, test kits, and optional automation before cycling.
• Lighting planning: The 151 cm length and 68 cm depth require a multi-fixture lighting plan selected around coral goals and aquascape height.
• Flow planning: Add dedicated wavemakers to move water around the central rockwork and through both long viewing sides.
• Installation planning: Allow access for glass cleaning, cabinet service, sump maintenance, and safe movement around the exposed sides.
• 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 the room-divider location: Confirm the installation location allows three-sided viewing, glass cleaning, cabinet access, and freight placement.
• Assemble and level the cabinet: Build the black aluminum cabinet according to Red Sea’s instructions and confirm it is level before placing the aquarium.
• Plan control-panel layout: Decide where controllers, power supplies, dosing hardware, and cable routing will sit before the cabinet becomes crowded.
• Select equipment before filling: Choose the return pump, skimmer, lighting, heater, wavemakers, optional ReefMat, and test equipment 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 level, and return flow.
• Tune the ReefGate slowly: Make small valve adjustments until the overflow and sump operate quietly and consistently.
• Use RO/DI water: RO/DI water is recommended for saltwater mixing and evaporation top-off.
• Cycle before stocking: Establish biological filtration fully before adding fish or corals.

What’s Included

• Euro-braced 19 mm ultra-clear peninsula aquarium
• Black aluminum super-structure cabinet with replaceable panels, hidden adjustable feet, stainless hardware, and slide-out control panel
• 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.