The Ultimate Open-Format Canvas for Extraordinary Marine Aquascapes
The Red Sea REEFER G3 Series is engineered for reefkeepers who demand uncompromised performance, whisper-quiet operation, and structural longevity. Designed as an open-format platform, the REEFER G3 provides high-efficiency water management and marine-grade cabinet craftsmanship, allowing you to build, customize, and synchronize your dream reef system using Red Sea’s ReefBeat ecosystem.
Key Features & Technological Enhancements
1. Superior Hydrodynamics & Silent Downflow
- Up to 50% Higher Water Circulation: Fully redesigned flow geometry delivers optimized turnover rates while decreasing return pump energy draw.
- Enlarged Rectangular Downflow Inlet: Drastically minimizes surface turbulence and air entrapment for ultra-quiet sump drainage.
- Bespoke ReefGate Precision Valve: High-precision, bespoke gate valve on the main downflow pipe allows micro-adjustments for silent, perfectly balanced operation.
- Dual Return Outlets: Upgraded nozzles and wider return piping (on larger models) improve internal circulation and eliminate dead zones.
2. Fortified Glass & Euro-Braced Structural Engineering
- Reinforced Ultra-Clear Glass: Constructed from ultra-clear, high-transmittance glass up to 19 mm (0.75 in) thick for true color representation without green tinting.
- Euro-Braced Strength: Models 425 and larger feature integrated euro-bracing for top-tier structural stability under high water mass. Models 170 through 350 feature smooth, rimless, bevel-edged designs.
3. Marine-Spec Laminated Cabinetry
- Heavy-Duty Construction: Built with water-resistant marine-spec plywood and epoxy-painted doors for long-term resistance to salt creep and humidity.
- Aluminum Framework: Models 525 and larger are reinforced with internal front aluminum support frames.
- Leveling System & Hardware: Includes stainless-steel hinges and heavy-duty adjustable leveling feet for precision alignment on uneven floors.
4. Reef-Spec Sump & Smart Integration
- Integrated ReefATO+ System: Includes Red Sea's solid-state Auto Top-Off system to stabilize water levels and salinity, featuring a digital temperature monitor and leak detector.
- ReefMat-Ready Mechanical Chamber: Removable filtration compartment seamlessly accommodates the Red Sea ReefMat automatic roller filter, or traditional micron filter socks and media cups.
- ReefBeat Ecosystem Integration: Fully compatible with Red Sea smart devices—including ReefLED lighting, ReefRun DC pumps, ReefWave gyres, and ReefDose pumps—controlled via the single ReefBeat app.
Technical Specifications Overview
| Reefer 200 G3+ | Reefer 300 G3+ | |
| Total system water volume | 52.8 gal | 79.3 gal |
| Display tank water vol. | 41.7 gal | 65 gal |
| In-Cabinet sump water vol. | 11.1 gal | 14.3 gal |
| Display tank Length | 23.6 " | 35.4 " |
| Display tank width | 22.6 " | 22.6 " |
| Display tank height (excluding light unit) | 20.9 " | 21.7 " |
| Total system height (excluding light unit) | 55.1 " | 55.9 " |
| Ultra-clear front glass | 0.39 " | 0.47 " |
| Ultra-clear side glass | 0.47 " | 0.47 " |
| Bottom glass | 0.39 " | 0.47 " |
| Back glass thickness | 0.31 " | 0.39 " |
| Rim type | Euro brace | Euro brace |
| ReefLED advanced light system | Not included | Not included |
| Water circulation | Not included | Not included |
| Main system pump | Not included | Not included |
| Hydrodynamic piping with Gate valve | Included | Included |
| Protein Skimmer | Not included | Not included |
| ReefMat / NanoMat | Not included | Not included |
| ReefATO+ kit included | Yes | Yes |
| ReefATO+ Ready | ReefATO+ Ready (included) | ReefATO+ Ready (included) |
| Slide out control panel | Not included | Not included |
Available Model Configurations
- Standard REEFER G3: REEFER 170, 200, 250, 300, 350, 425, 525, 625, and 750.
- REEFER-S G3 Series: Extra-deep, super-sized builds (REEFER-S 550, 700, 850, and 1000).
- Peninsula G3 Series: Room-divider 3-sided viewing aquariums (Peninsula 350, 500, S-700, S-950).
- Deluxe Editions: Includes factory-matched ReefLED G2 lighting units and custom mounting hardware.
