Red Sea Reefer 300 G3 - White Cabinet

Red Sea Reefer 300 G3 - White Cabinet

The Red Sea Reefer 300 G3 - White Cabinet is a premium 300 litre / 79.3 gallon reef-ready aquarium and cabinet system that gives aquarists a deeper 90 cm REEFER G3 display with Red Sea’s upgraded sump-based infrastructure and a bright white marine-spec cabinet.

This base REEFER G3 package is built for hobbyists who want a clean professional foundation for a custom reef aquarium while keeping full control over the final equipment selection. It includes a rimless ultra-clear glass aquarium, white marine-spec plywood cabinet, REEF-SPEC sump, ReefMat-ready mechanical filtration chamber, pre-assembled plumbing, ReefGate precision valve, central overflow with removable surface skimmer, curved dual return nozzles, and integrated ReefATO+ smart top-off control. The result is a refined reef platform ready for your preferred lighting, pump, skimmer, heater, wavemakers, and automation accessories.

Red Sea REEFER 300 G3 White Reef System

• Deep 90 cm reef platform: The 300 G3 combines a practical 90 cm display length with 57.5 cm of depth, creating a more dimensional reef canvas than narrower systems.
• 79.3 gallon total volume: The 300 L system gives more water stability and reef planning flexibility while staying in a manageable mid-size footprint.
• White cabinet finish: The white marine-spec cabinet gives the aquarium a bright, modern, furniture-style appearance for contemporary homes, offices, and display spaces.
• Custom equipment freedom: Return pump, lighting, skimmer, heater, wavemakers, dosing equipment, and controls are selected separately for a build that matches the customer’s reef goals.
• Rimless G3 display: The ultra-clear rimless aquarium keeps the look clean and modern while providing strong viewing clarity.
• Strong upgrade path: The sump and ReefATO+ platform make this system a good foundation for a Red Sea ecosystem build with future ReefMat, ReefRun, ReefLED, ReefWave, and ReefDose upgrades.

Ultra-Clear Glass with Extra Aquascaping Depth

• 246 litre display volume: The display provides room for coral colonies, open rockwork, reef-safe livestock choices, and a more mature aquascape.
• 57.5 cm display width: The added front-to-back space helps prevent the aquascape from looking flat and creates more room for ledges, caves, shelves, and open sand.
• 12 mm glass build: The REEFER 300 G3 is listed with 12 mm front, side, and bottom glass.
• Ultra-clear viewing: Low-iron glass improves clarity so fish, coral, and rockwork show with less colour distortion.
• Open-top rimless style: The braceless display provides a clean high-end look and convenient access for maintenance.
• Hidden under-cabinet equipment: The sump keeps filtration and support equipment away from the main display for a cleaner reef presentation.

Quiet G3 Downflow and Improved Returns

• Redesigned flow system: REEFER G3 systems use hydrodynamically improved plumbing designed for better water movement and efficiency.
• Low-turbulence drain: The enlarged rectangular downflow inlet helps reduce turbulence and makes the system easier to tune quietly.
• ReefGate valve: The precision gate valve gives fine control over the downflow line for near-silent operation when properly adjusted.
• Surface skimming overflow: The removable surface skimmer helps draw film and floating debris into the filtration path.
• Curved dual returns: The improved return nozzles help distribute water more evenly back into the aquarium.
• Clean plumbing package: The included pipework gives the system a factory-designed drain and return layout instead of a fully custom plumbing project.

REEF-SPEC Sump and Smart ReefATO+

• 54 litre sump: The sump gives practical space for mechanical filtration, skimmer selection, return equipment, media, dosing lines, probes, and maintenance access.
• ReefMat-ready filtration: The removable mechanical compartment includes micron socks and media cups and is designed for optional ReefMat installation.
• Integrated ReefATO+: ReefATO+ helps maintain water level and salinity stability while adding temperature monitoring and leak detection.
• Flexible filtration planning: The sump can support carbon, media reactors, refugium-style nutrient export, protein skimming, and automation accessories depending on the build.
• Service-friendly cabinet layout: Equipment is housed under the aquarium for easier access and a cleaner display.
• Built for long-term reefkeeping: The system can start as a straightforward mixed reef and grow into a more automated advanced setup over time.

Red Sea Reefer 300 G3 White Specifications

• Total system volume: 300 L / 79.3 gal.
• Display volume: 246 L / 65.0 gal.
• Sump volume: 54 L / 14.3 gal.
• Display dimensions: 90 cm L x 57.5 cm W x 55 cm H / approx. 35.4 x 22.6 x 21.7 in.
• Total height with cabinet: 142 cm / approx. 55.9 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.
• Recommended ReefMat: Red Sea ReefMat 500, sold separately.

Application Notes for the REEFER 300 G3 White

• Best use: Designed for mid-size reef aquariums, LPS displays, soft coral systems, custom mixed reefs, and aquarists who want a deeper display footprint.
• Equipment selection: Add a suitable return pump, skimmer, lighting, heater, wavemakers, and test kits before cycling the system.
• Lighting planning: The recommended ReefLED G2 115 is sold separately, and lighting should be selected around coral type and coverage goals.
• Flow planning: Additional wavemakers should be chosen based on coral placement, rockwork density, and desired circulation pattern.
• ReefMat option: The sump is ReefMat ready for customers who want to upgrade mechanical filtration later.
• 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.