Red Sea REEFER MAX 300 G3 Aquarium System (65 Gal)

Red Sea REEFER MAX 300 G3 Aquarium System (65 Gallon) is the ultimate plug-and-play reef aquarium. Every REEFER G3 MAX arrives with Red Sea's best-in-class water management, filtration, circulation, and lighting already matched to the tank, all controllable from the Red Sea ReefBeat app. The 300 pairs a wider, deeper 65-gallon display with two ReefLED G2 lights, two ReefWave pumps, and the larger ReefMat 500 roller. Just pick your stand color and build your reef. Compare the REEFER MAX 250 G3, or browse all aquarium systems and corals.

What’s Included

• REEFER MAX 300 G3 aquarium: ultra-clear, beveled-edge, rimless glass with a low-profile black overflow and hidden plumbing.
• Marine-spec cabinet in your choice of Black or White, with a matching sump and pre-glued plumbing.
• 2x ReefLED G2 115 lights + mounting arms (full-length reef-safe coverage, ReefBeat app control).
• REEFER DC 300 Protein Skimmer (self-leveling, smart-controlled, Sicce PSK pump).
• 2x ReefWave 25 gyre powerheads (dual cross-flow circulation).
• ReefRun G2 4000 DC return pump + ReefRun controller.
• ReefMat 500 automatic filter roller (larger-capacity, app-monitored mechanical filtration).
• ReefATO+ auto top-off with temperature monitoring and leak detection.
• Slide-Out Control Panel 25 to mount your controllers in one place.
• 5-year manufacturer warranty (3 years standard + 2 years with registration).

Smart, App-Controlled Reefing

• ReefBeat app: run both lights, both wave pumps, the skimmer, ATO, and filter roller from one app, with schedules, feed mode, alerts, and safety shut-offs.
• Two ReefLED G2 115 lights: 115W each, ~500 PAR at the surface, adjustable 10,000K to 23,000K, boosted blue and UV for coral color and growth across the full length of the tank.
• Two ReefWave 25 pumps: dual gyre flow keeps every corner of the reef in motion.
• REEFER DC 300 skimmer: manual neck cleaner, precision foam control, and a foam-view window.
• ReefMat 500 + ReefATO+: larger-capacity hands-off mechanical filtration and stable salinity with leak detection.

Specifications

Choose Your Stand Color

Pick Black or White from the drop-down above. The marine-spec laminated cabinet is built for strength and moisture resistance with leveling feet and stainless steel hinges. Selecting a color shows its matching render.

Recommended Pairings

• Salt mixes: mix up saltwater for your fill and water changes.
• CaribSea Ocean Direct: live marine sand to start the reef.
• Seachem HydroTote: haul RO/DI and saltwater for pickup and top-off.
• Corals: stock your new reef.
• All aquarium systems: compare other reef-ready tanks.

FAQ

Is this a complete system?
Yes. The MAX package includes the tank, cabinet, sump, plumbing, two ReefLED G2 lights, DC skimmer, two ReefWave pumps, ReefRun return pump, ReefMat 500 filter roller, and ReefATO+, all app-controlled. Add salt, sand, rock, and livestock and you are reefing.

How is it different from the 250?
The 300 has a wider, deeper display (65 gallons versus 53.6) with a larger 15-gallon sump and the bigger ReefMat 500 filter roller. Lighting and flow are the same dual ReefLED G2 and dual ReefWave setup.

Freshwater or saltwater?
Saltwater and reef only. The ReefMat and ReefATO+ are not compatible with freshwater setups.

What are the display dimensions?
The display tank is 35.4 in x 22.6 in x 21.7 in (65 gallons), and the total system stands 55.9 in tall.

How does the warranty work?
Every REEFER G3 includes a 3-year warranty, plus 2 more years when you register your system with Red Sea within 90 days of purchase.