Red Sea REEFER 525 Aquarium in White
The Red Sea REEFER 525 G3 in white blends crisp aesthetics with advanced engineering to create a stable, reef-ready aquarium system. With ultra-clear glass, a reinforced cabinet, modern plumbing, and the integrated ReefATO+, this tank delivers reliability and strong performance from day one.
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Red Sea REEFER 525 G3 Aquarium System – White
The Red Sea REEFER 525 G3 delivers a clean, minimalist look with its bright white cabinet and ultra-clear glass display. Because this system blends advanced engineering with elegant design, aquarists gain a reliable foundation for building a thriving reef. Moreover, the entire G3 series introduces upgraded plumbing, enhanced water-management tech, and reinforced construction that simplifies long-term care.
Discover the REEFER 525 G3 Display
The 111.7-gallon display uses crystal-clear beveled glass that brings coral color and movement into focus. Its low-profile overflow hides all major plumbing to keep the viewing area sharp and uncluttered. Along the top edge, the eurobraced frame increases stability without compromising the modern, rimless-style appearance reefers love.
| REEFER 350 G3 | REEFER 425 G3 | REEFER 525 G3 | REEFER 625 G3 | |
| Total system water volume | 90.3 gal | 114.4 gal | 142.7 gal | 163.8 gal |
| Display tank water vol. | 72.1 gal | 90.6 gal | 111.7 gal | 131.3 gal |
| In-Cabinet sump water vol. | 18 gal | 24 gal | 31 gal | 32 gal |
| Display tank Length | 47.2 " | 47.2 " | 59.1 " | 59.1 " |
| Display tank width | 19.7 " | 23.6 " | 23.6 " | 25.6 " |
| Display tank height (excluding light unit) | 20.9 " | 21.7 " | 21.7 " | 23.6 " |
| Total system height (excluding light unit) | 55.1 " | 55.9 " | 55.9 " | 58.3 " |
| Ultra-clear front glass | 0.47 " | 0.47 " | 0.59 " | 0.75 " |
| Ultra-clear side glass | 0.59 " | 0.59 " | 0.59 " | 0.75 " |
| Bottom glass | 0.47 " | 0.47 " | 0.59 " | 0.59 " |
| Back glass thickness | 0.47 " | 0.47 " | 0.59 " | 0.75 " |
| Rim type | Rimless | NEW! Euro Brace | NEW! Euro Brace | NEW! Euro Brace |
| ReefLED advanced light system | DLX Version 2 Units (RL G2 115) (optional) | DLX Version 2xRL G2 115 or 2xRL G2 170 (optional) | DLX Version 3xRL G2 115 or 2xRL G2 170 (optional) |
DLX Version 3xRL G2 115 or 2xRL G2 170 (optional)
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| Water circulation | Not included | Not included | Not included | Not included |
| Main system pump | Not included | Not included | Not included | Not included |
| NEW! Hydrodynamic piping with Gate valve | X | X | X | X |
| Protein Skimmer | Not included | Not included | Not included | Not included |
| ReefMat / NanoMat | Not included | Not included | Not included | Not included |
| ReefATO+ kit included | Yes | Yes | Yes | Yes |
| ReefATO+ Ready | ReefATO+ Ready (included) | ReefATO+ Ready (included) | ReefATO+ Ready (included) | ReefATO+ Ready (included) |
| Slide out control panel | Not included | Not included | Not included | Not included |
Premium White Marine-Spec Cabinet
The white marine-spec stand pairs durability with clean aesthetics. It uses moisture-resistant laminated plywood, adjustable leveling feet, and stainless steel hardware for long-term stability. Because the stand matches the tank footprint precisely, the entire system looks seamless from top to bottom. Larger models—including the 525 G3—also gain internal aluminum reinforcement for added strength.
Filtration Made Simple with the REEFER G3 Sump
The included glass sump streamlines maintenance and supports a wide range of equipment upgrades as your reef matures. You can easily integrate Red Sea’s ReefMat roller filter and REEFER DC protein skimmer (sold separately), creating a modular filtration system that grows with your tank.
Recommended Pairings:
• ReefMat 1200 Fleece Roller Filter
• REEFER DC 600 Protein Skimmer
Upgraded G3 Plumbing for Smoother Operation
The REEFER 525 G3 arrives with pre-assembled, ready-to-install plumbing—no glue, no modifications. Red Sea reduced the number of tight turns in the drain line to improve flow, and the redesigned ReefGate valve gives you clean, quiet tuning with just a few adjustments.
ReefATO+ Included for Smart Water Management
Every G3 system includes the ReefATO+, which handles top-off control while also monitoring temperature and detecting leaks. It pushes real-time data and alerts through the ReefBeat app, so you stay in sync with your system wherever you are.
ReefATO+ Highlights:
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Backup overfill protection built into the sensor
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±0.1° temperature precision
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Leak detection using saltwater-resistant titanium probes
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Automatic pump shutdown when a leak or overfill occurs
Specifications
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Display Dimensions: 59.1" L × 23.6" W × 21.7" H
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Total System Height: 55.9"
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Display Volume: 111.7 Gallons
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Total Volume: 142.7 Gallons
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Sump Volume: 31 Gallons
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Glass Thickness: 0.59"
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ReefATO+ Pump Power: 6–10W
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Max Pump Flow: 75 GPH
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Max Head Height: 8 ft
Note: ReefATO+ is not compatible with freshwater systems.
What's Included
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REEFER 525 G3 Aquarium
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White Marine-Spec Cabinet
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Glass Sump & Pre-Glued Plumbing
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ReefATO+ Auto Top Off System
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5-Year Warranty (3 years standard + 2 years upon registration)
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