Red Sea Reefer 250 G3 - White Cabinet

The Red Sea Reefer 250 G3 - White Cabinet is a premium 245 L / 64.7 gal rimless reef-ready aquarium and cabinet system for aquarists who want a larger REEFER G3 display with a bright white marine-spec stand.

Built around a 90 cm ultra-clear glass display, REEF-SPEC sump, ReefMat-ready mechanical chamber, ReefGate precision valve, silent downflow system, curved dual returns, central surface-skimming overflow, and integrated ReefATO+, the REEFER 250 G3 gives hobbyists a strong professional foundation for a custom reef aquarium. This base system is ideal for reef keepers who want to choose their own lighting, pump, skimmer, flow, heating, and control equipment while starting with Red Sea’s refined G3 tank, cabinet, sump, and plumbing platform.

Red Sea REEFER 250 G3 White Reef System

• Larger rimless REEFER platform: The 250 gives reef keepers a longer 90 cm display while staying in the elegant rimless REEFER G3 category.
• White cabinet finish: The white marine-spec cabinet creates a clean, modern, brighter installation for contemporary homes, offices, and display spaces.
• 64.7 gallon total volume: The 245 L system provides more stability and livestock planning flexibility than smaller compact reef systems.
• Custom equipment freedom: Return pump, lighting, skimmer, heater, wavemakers, dosing, and control equipment can be selected separately to match the reef plan.
• REEF-SPEC sump included: The system includes a proper in-cabinet sump instead of relying on limited rear filtration space.
• Excellent mixed reef foundation: The 250 size class is well suited to aquarists who want a polished, expandable reef aquarium with room for long-term coral growth.

90 cm Ultra-Clear Display with White Cabinet

• 53.6 gallon display: The 203 L display gives more usable coral room and fish swimming space than shorter systems.
• 90 cm length: The longer viewing panel supports a more natural reefscape with open channels, island structures, and varied coral zones.
• 12 mm glass build: The REEFER 250 G3 uses 12 mm front, side, and bottom glass according to current product specifications.
• Ultra-clear rimless presentation: Low-iron glass and open-top styling give the tank a clean premium display appearance.
• White marine-spec plywood cabinet: The included stand provides matched support and a bright furniture-style look.
• Hidden equipment storage: The sump and future equipment are housed below the display to keep the aquarium visually clean.

Red Sea G3 Flow and Quiet Overflow Design

• Hydrodynamically improved flow: REEFER G3 systems use redesigned piping and flow architecture for better circulation efficiency.
• Silent downflow system: The enlarged rectangular inlet reduces turbulence and helps the overflow run more quietly.
• ReefGate precision valve: The bespoke gate valve allows accurate drain control for quieter, more stable sump operation.
• Surface-skimming overflow: The central overflow includes a removable surface skimmer for easier maintenance and cleaner water surface management.
• Curved dual return nozzles: Improved return outlets help distribute water back into the display more effectively.
• Clean included plumbing: Pre-assembled downflow and return plumbing make the setup cleaner than building a custom drain and return system from scratch.

ReefMat-Ready Sump and ReefATO+ Stability

• 42 L REEF-SPEC sump: The sump provides dedicated space for filtration, return equipment, skimmer selection, media, and optional upgrades.
• Mechanical chamber with socks and cups: The included micron socks and media cups allow simple mechanical and media filtration from the start.
• Optional ReefMat upgrade: The sump is designed to accept Red Sea ReefMat equipment for automatic mechanical filtration.
• Integrated ReefATO+: ReefATO+ helps maintain stable water level and salinity and adds temperature monitoring and leak detection.
• Cleaner maintenance workflow: The cabinet sump makes filtration service easier and keeps messy equipment away from the display.
• Strong long-term platform: The system gives reef keepers a solid base for dosing, monitoring, skimming, media, and automation upgrades as the reef matures.

Red Sea Reefer 250 G3 White Specifications

• Total system volume: 245 L / 64.7 gal.
• Display volume: 203 L / 53.6 gal.
• Sump volume: 42 L / 11.1 gal.
• Display dimensions: 90 cm L x 50 cm W x 53 cm H / approx. 35.4 x 19.7 x 20.9 in.
• Total height with cabinet: 140 cm / approx. 55.1 in.
• Glass thickness: 12 mm front glass, 12 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 115, sold separately.

Application Notes for the REEFER 250 G3 White

• Best use: Ideal for larger compact reef builds, mixed reef aquariums, soft coral systems, LPS reefs, and carefully planned custom coral displays.
• Complete the equipment package: Add a return pump, skimmer, lighting, heater, and flow pumps before starting the reef.
• Lighting flexibility: The recommended ReefLED G2 115 is sold separately, and lighting should be selected based on coral goals and coverage preference.
• Additional flow: Wavemakers are recommended based on rockwork, coral type, and target flow pattern.
• Automation potential: ReefATO+ is included and ReefMat compatibility gives the system a clean future upgrade path.
• 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 correctly and confirm it is level before placing the aquarium.
• Select core equipment first: Choose return pump, protein skimmer, lighting, heater, and wavemakers before filling the system.
• Install sump and plumbing: Follow Red Sea instructions for the overflow, ReefGate valve, drain, return plumbing, sump, and ReefATO+.
• Leak test with freshwater: Confirm all plumbing, sump operation, and return flow before final saltwater setup.
• Tune the ReefGate: Make small 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 before adding fish or corals, then stock gradually.

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.