The Red Sea G3 Series: Next‑Generation Reef‑Ready Aquariums

Red Sea’s G3 series (also called “REEFER G3”) is the latest generation of integrated reef aquarium systems. It represents a major leap forward in terms of flow dynamics, structural integrity, smart systems, and user convenience.

Key Features Across the G3 Line

• Hydrodynamically optimized plumbing with fewer sharp 90° turns, larger downflow piping, and more efficient return paths, delivering up to 50% more water circulation.

• ReefGate precision gate valve to fine-tune overflow and drain flow for quieter, more stable performance.

• Ultra-clear, reinforced glass with thicker panels (up to 19 mm or 0.75") and euro-bracing on larger models for improved safety and structural integrity.

• Integrated smart systems: ReefATO+ for automatic top-off, temperature monitoring, and leak detection, included across all G3 models.

• ReefMat–ready sumps, modular plumbing, and upgrade-friendly designs for skimmers, reactors, refugia, and other gear.

• Strong warranty coverage: 3 years standard, with an option to extend to 5 years through registration.

• A range of form factors: the classic front-view REEFER line, premium S-series models with deeper dimensions, and Peninsula-style dual-view aquariums.

Representative G3 Aquarium Specification Table For Some of the available models. To learn more please visit the  Aquarium Specialty Red Sea Aquarium Link.

Subseries Overview: What Sets Each G3 Type Apart

REEFER G3 (Core Series)

This is the base model line for the G3 family. It includes the core structure: tank, cabinet, modular plumbing, ReefATO+, sump, and smart leak/temperature sensors. It leaves component choices—like lighting, return pump, and skimmer—up to the aquarist.

• Best for hobbyists who want flexibility and customization.

• Built-in smart systems and robust build quality.

• Requires more planning for equipment integration.

REEFER MAX G3 (Plug & Play)

The MAX models include the same G3 base with additional equipment like ReefLED lighting, return pumps, wave pumps, and controllers—all pre-matched to the system.

• Best for those who want a turnkey system.

• Components are optimized for each model’s size and requirements.

• Higher initial cost but streamlined setup.

REEFER S-Series (Premium Format)

The S-series is built for advanced reefers. These models feature increased tank depth, ultra-thick glass, internal bracing, and slide-out control panels.

• Best for large, complex coral systems.

• Great visual impact thanks to taller, deeper dimensions.

• Heavy-duty cabinetry and reinforcements for high-end installations.

REEFER Peninsula (Dual-View Layout)

Peninsula models are designed as room dividers or statement pieces. They offer long, dual-view displays with reinforced structure and smart cable routing for central placement.

• Best for open spaces and panoramic viewing.

• Dual-facing lighting and plumbing layout.

• Demands more access space for service on both sides.

Choosing the Right G3 Aquarium

When selecting a G3 model, consider:

1. Size and Layout: Larger tanks offer better stability and design freedom, but also take more space and cost more to run.

2. Viewing Style: Traditional vs. Peninsula vs. S-series. Think about where the tank will be placed.

3. Setup Effort: G3 base = more flexibility, more planning. MAX = plug & play.

4. Structural Needs: Tanks above 90 gallons begin to include euro-bracing and thicker glass for durability.

5. Growth Potential: All G3 systems are upgrade-ready. Choose a model that fits your long-term vision, not just your starting point.