Red Sea Reefer S-700 G3 - Black Cabinet

The Red Sea Reefer S-700 G3 - Black Cabinet is a premium 699 litre / 184.6 gallon reef-ready aquarium and cabinet system built for aquarists who want Red Sea’s REEFER-S G3 platform in a large 150 cm format with a black aluminum super-structure cabinet.

Designed for high-end custom reef builds, the REEFER S-700 G3 combines a euro-braced 19 mm ultra-clear glass display, rigid aluminum cabinet frame, replaceable black panels, slide-out control panel, REEF-SPEC sump, ReefMat-ready mechanical chamber, ReefGate precision drain valve, central overflow with removable surface skimmer, curved dual returns, pre-assembled plumbing, and integrated ReefATO+ smart top-off control. This is a base REEFER-S system, so lighting, return pump, skimmer, heater, wavemakers, livestock, rock, sand, salt, and optional ReefMat are selected separately.

Red Sea REEFER S-700 G3 Black Reef System

• Large REEFER-S reef platform: The S-700 G3 gives reef keepers a substantial 150 cm display with the deeper 68 cm front-to-back dimension that defines the REEFER-S lineup.
• 699 litre total system volume: The larger water volume supports improved stability, more flexible livestock planning, and better long-term coral growth potential than smaller reef systems.
• Black aluminum cabinet: The black cabinet creates a bold, high-contrast presentation while the aluminum super-structure provides a rigid premium support platform.
• Custom equipment freedom: Return pump, lighting, skimmer, heater, wavemakers, dosing, automation, and filtration upgrades can be chosen around the exact reef style being built.
• Premium G3 water management: The system includes Red Sea’s improved flow architecture, quiet downflow design, ReefGate drain control, and dual return outlets.
• Red Sea ecosystem ready: The S-700 G3 is a strong platform for optional ReefRun, ReefLED, ReefWave, ReefMat, ReefDose, REEFER skimmer, and ReefBeat-connected equipment.

19 mm Ultra-Clear Euro-Braced Display

• 564 litre display volume: The main aquarium provides 148.9 gallons of display space for larger coral colonies, carefully selected fish, open sand areas, and mature aquascaping.
• 150 x 68 x 65 cm display: The added 68 cm depth gives aquascapers room for layered rockwork, swim-throughs, caves, negative space, and front-to-back coral zoning.
• 19 mm glass construction: The S-700 G3 is listed with 19 mm front, side, bottom, and back glass for a substantial large-system build.
• Euro-braced format: The euro-bracing reinforces the large display while keeping the aquarium clean and professional looking.
• Ultra-clear viewing: Low-iron glass improves clarity and helps coral colour, fish movement, and reef lighting show with less green tint.
• Showpiece reef proportions: The 150 cm length and 65 cm height create a strong room presence while remaining more compact than the 180 cm and 210 cm REEFER-S models.

Black Aluminum Cabinet and Control Panel

• Aluminum super-structure: The cabinet uses a marine-spec aluminum frame for a strong premium support system.
• Replaceable black panels: The exterior panels create a finished black look while remaining part of Red Sea’s modular cabinet design.
• Hidden adjustable feet: Leveling feet help the system sit correctly on suitable flooring while preserving a clean exterior appearance.
• Slide-out control panel: The included panel gives a cleaner place to mount controllers, power supplies, dosing hardware, and smart reef equipment.
• Stainless hardware: Cabinet hardware is suited to the humid environment around marine aquariums.
• Organized equipment area: The cabinet provides practical space for the sump, ATO hardware, controller layout, cable management, and future upgrades.

G3 Flow System and ReefGate Tuning

• Optimized circulation: REEFER-S G3 systems use redesigned water management to improve circulation and efficiency.
• Quiet downflow: The enlarged rectangular downflow inlet helps reduce turbulence and operating noise when properly adjusted.
• ReefGate precision valve: The high-precision valve allows fine drain-line tuning for stable, near-silent overflow operation.
• Central overflow: The overflow includes a removable surface skimmer to help draw film and floating debris into the filtration path.
• Curved dual return outlets: Dual returns improve return-water distribution across the 150 cm display and complement dedicated reef wavemakers.
• Pre-assembled plumbing: Factory-designed downflow and return plumbing helps simplify setup and keeps the under-cabinet system clean.

REEF-SPEC Sump and ReefATO+

• 135 litre sump volume: The sump provides space for skimmer selection, return pump installation, mechanical filtration, media, probes, dosing lines, and maintenance access.
• ReefMat-ready mechanical chamber: The sump includes micron socks and media cups and can be upgraded with an optional Red Sea ReefMat 1200.
• Integrated ReefATO+: ReefATO+ helps manage evaporation, stabilize salinity, and provide temperature monitoring and leak detection.
• Refugium and media flexibility: The sump can support carbon, media reactors, refugium-style nutrient export, dosing, and monitoring equipment depending on the build.
• Serviceable large-system layout: The cabinet sump keeps equipment accessible without crowding the display.
• Strong long-term foundation: The system can start as a clean mixed reef and scale into a more automated high-performance coral system.

Red Sea Reefer S-700 G3 Black Specifications

• Total system volume: 699 L / 184.6 gal.
• Display volume: 564 L / 148.9 gal.
• Sump volume: 135 L / 35.6 gal.
• Display dimensions: 150 cm L x 68 cm W x 65 cm H / approx. 59.1 x 26.8 x 25.6 in.
• Total height with cabinet: 153 cm / approx. 60.2 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: 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 REEFER S-700 G3

• Best use: Ideal for large mixed reefs, LPS systems, soft coral displays, SPS-capable builds with proper lighting and flow, and premium custom reef installations.
• Equipment planning: Add a return pump, reef lighting, skimmer, heater, wavemakers, test kits, and optional automation before cycling.
• Lighting planning: The 150 cm length and 68 cm depth should be covered with a multi-fixture lighting plan matched to coral goals.
• Flow planning: Dedicated wavemakers are recommended to move water through the full depth and length of the aquascape.
• 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-S G3 Series Video

Setup and Installation Notes

• Assemble and level the cabinet: Build the black aluminum cabinet according to Red Sea’s instructions and confirm the system is level before placing the aquarium.
• Plan equipment before filling: Choose the return pump, skimmer, lighting, heater, wavemakers, optional ReefMat, controller hardware, and dosing equipment before adding water.
• Use the slide-out panel: Plan controller and power-supply placement early so the equipment area remains organized and serviceable.
• Install plumbing carefully: Confirm the overflow, downflow, ReefGate valve, return plumbing, sump, and ReefATO+ are installed correctly.
• 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 run 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 glass 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
• 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.