Red Sea Reefer 200 G3 - Black Cabinet

The Red Sea Reefer 200 G3 - Black Cabinet is a premium reef-ready aquarium and cabinet system for aquarists who want a compact but deeper sump-based reef platform with Red Sea’s third-generation water management and integrated ReefATO+.

With a 200 L / 52.8 gal total system volume and a deeper 57.5 cm display width, the REEFER 200 G3 gives reef keepers more aquascaping depth than the 170 while keeping the same 60 cm length. The system includes a rimless ultra-clear display, black 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 hardware.

Red Sea REEFER 200 G3 Black Reef System

• Deep compact reef platform: The REEFER 200 G3 keeps a space-friendly 60 cm length while increasing display width to 57.5 cm for a more spacious reef layout.
• 52.8 gallon total volume: The extra volume helps improve stability compared with smaller compact systems while staying manageable for maintenance.
• Black cabinet finish: The black marine-spec plywood cabinet creates a bold modern look and visually frames the reef display.
• Base-system freedom: Choose the lighting, return pump, skimmer, heater, wavemakers, controller, and dosing equipment that best match the reef you want to build.
• Sump-based expandability: The in-cabinet sump gives more equipment flexibility than most rear-chamber all-in-one tanks.
• Ideal for premium custom builds: The 200 is a strong size for aquarists who want a high-quality foundation before investing in lighting, flow, filtration, and automation hardware.

Deeper Ultra-Clear Display and Black Cabinet

• 158 L / 41.7 gal display: The display gives hobbyists more room for coral placement, rockwork, and livestock planning than smaller nano-class aquariums.
• 57.5 cm front-to-back width: The added depth allows for island structures, sloped rockwork, swim-throughs, shadow zones, and a more dimensional reefscape.
• Rimless ultra-clear glass: The display uses low-iron glass for a cleaner, brighter view of the reef.
• Modern beveled-edge styling: The rimless G3 design gives the system a clean display-tank appearance.
• Marine-spec cabinet: The black plywood cabinet includes leveling feet and is designed to support the aquarium and sump properly.
• Cleaner room presence: The dark cabinet helps hide shadows and equipment inside the stand while keeping the focus on coral colour and aquascape shape.

G3 Silent Downflow and ReefGate Valve

• Hydrodynamic G3 plumbing: The REEFER G3 water-management system is designed for improved circulation and reduced energy waste compared with earlier flow layouts.
• Quiet downflow inlet: The enlarged downflow design helps reduce turbulence and operating noise.
• ReefGate flow valve: The precision gate valve allows fine adjustment of the drain for stable, near-silent sump operation.
• Removable surface skimmer: The central overflow pulls from the surface to help remove film and support better gas exchange.
• Curved dual returns: Improved return nozzles help distribute return flow more naturally into the display.
• Pre-assembled plumbing: Factory-designed plumbing helps reduce installation guesswork and keeps the under-cabinet system organized.

REEF-SPEC Sump and ReefMat-Ready Filtration

• 42 L / 11.1 gal sump: The sump provides practical space for mechanical filtration, return pump, skimmer, media, and optional upgrades.
• Mechanical chamber included: Micron socks and media cups support simple mechanical and chemical filtration from the start.
• ReefMat-ready design: The mechanical chamber is designed for optional Red Sea ReefMat installation if automatic fleece-roll filtration is desired later.
• Integrated ReefATO+: The included smart ATO system helps maintain stable water level and salinity while adding temperature monitoring and leak detection.
• Flexible equipment bay: The sump-based format gives more room to plan skimming, media use, dosing, and maintenance access than a small rear-sump tank.
• Built for long-term reefkeeping: The system is designed as a foundation that can grow from a simple mixed reef into a more automated Red Sea ecosystem.

Red Sea Reefer 200 G3 Black Specifications

• Total system volume: 200 L / 52.8 gal.
• Display volume: 158 L / 41.7 gal.
• Sump volume: 42 L / 11.1 gal.
• Display dimensions: 60 cm L x 57.5 cm W x 53 cm H / approx. 23.6 x 22.6 x 20.9 in.
• Total height with cabinet: 140 cm / approx. 55.1 in.
• Glass thickness: 10 mm front glass, 12 mm side glass, 10 mm bottom glass.
• Display format: Rimless ultra-clear glass 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 ReefATO+.
• Recommended return pump: Red Sea ReefRun G2 4000, sold separately.
• Recommended lighting: Red Sea ReefLED G2 115, sold separately.

Application Notes for the REEFER 200 G3

• Best use: Ideal for soft coral aquariums, LPS reefs, mixed reefs, and compact custom sump-based reef systems.
• Depth advantage: The wider display is especially useful for aquascapers who want more front-to-back rockwork and coral placement options.
• Equipment planning: Select return pump, skimmer, lighting, heating, and flow equipment before cycling the aquarium.
• Flow planning: Add wavemakers based on aquascape density, coral needs, and target flow pattern.
• Automation path: ReefATO+ is included, and the ReefMat-ready sump gives an easy path toward automatic mechanical filtration.
• Not included: Lighting, return pump, protein skimmer, heater, wavemakers, livestock, rock, sand, salt, optional ReefMat, dosing gear, and test kits are sold separately unless otherwise stated.

Red Sea REEFER G3 Series Video

Setup and Installation Notes

• Level the cabinet: Assemble the black cabinet and confirm it is level before placing the aquarium.
• Plan equipment fit: Confirm return pump, skimmer, heater, lighting, flow pumps, and optional ReefMat fit the intended build.
• Install plumbing correctly: Follow Red Sea’s instructions for overflow, downflow, return plumbing, ReefGate valve, sump, and ReefATO+ setup.
• Leak test before reef setup: Run the system with freshwater to confirm plumbing seals, sump operation, and flow control.
• Tune the drain: Adjust the ReefGate gradually for stable water level and quiet downflow performance.
• Use RO/DI water: Mix saltwater and top off evaporation with RO/DI water for better reef chemistry control.
• Cycle before livestock: Establish biological filtration before adding fish and corals.

What’s Included

• Ultra-clear rimless glass 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
• 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.