Red Sea REEFER 300 G3+ Aquarium System – 65 Gallons

A Premium, Customizable Reef Aquarium with Smart Monitoring

The Red Sea REEFER 300 G3+ combines exceptional aquarium craftsmanship, advanced plumbing, and intelligent monitoring technology into a premium reef-ready aquarium system.

Featuring a 65-gallon ultra-clear glass display, a 14.3-gallon sump, and Red Sea's ReefControl Lite technology, the REEFER 300 G3+ is designed for reefkeepers who want a beautiful, high-quality aquarium with the flexibility to select their preferred lighting, pumps, and filtration equipment.

The G3+ generation introduces redesigned high-flow plumbing, reinforced eurobraced construction, and integrated digital automatic top-off, delivering a modern foundation for a customized saltwater aquarium.

Whether you're creating a colorful mixed reef, SPS-dominant aquarium, or impressive fish and coral display, the REEFER 300 G3+ provides the performance, flexibility, and elegant design to bring your vision to life.

Key Features

• 79.3 Gallons Total System Volume – 65-gallon display with a 14.3-gallon sump

• Ultra-Clear Glass Construction – 12mm front, side, and bottom glass with 10mm rear glass

• Reinforced Eurobracing – Additional structural support with a clean, contemporary appearance

• ReefControl Lite Controller Included – Smart connectivity for compatible aquarium sensors and equipment

• Digital Automatic Top-Off Included – Integrated water-level management with temperature monitoring

• Redesigned High-Flow Plumbing – Up to 50% more water circulation with improved energy efficiency

• Precision Gate Valve – Fine-tuned overflow adjustment for quiet, consistent operation

• REEF-SPEC Sump – ReefMat-ready filtration with adjustable skimmer chamber and refugium flexibility

• Reinforced Cabinet – Modern floating appearance with aluminum-supported construction

• Customizable Equipment Configuration – Choose your preferred lighting, circulation pumps, return pump, and filtration

• Up to 5-Year Manufacturer Warranty – 3 years standard plus 2 additional years with qualifying registration

Advanced ReefControl Lite Technology

The G3+ generation introduces Red Sea's ReefControl Lite, bringing connected aquarium monitoring and compatible equipment management into one convenient system.

Through the ReefBeat app, compatible Red Sea devices and sensors can be monitored and controlled from your smartphone.

The included ReefControl Lite system features:

• Support for up to two compatible ReefSense probes and sensors

• Connection for one compatible 12V DC device

• ReefBeat app connectivity

• Expandable aquarium monitoring capabilities

The ReefControl Lite provides a convenient foundation for automated aquarium management, with additional compatible sensors and probes available separately.

Integrated Digital Automatic Top-Off

The REEFER 300 G3+ includes Red Sea's digital automatic top-off module, designed to automatically replace evaporated freshwater and help maintain consistent aquarium water levels and salinity.

An integrated temperature sensor provides additional aquarium monitoring through the ReefBeat ecosystem.

This system reduces the need for manual freshwater top-off and helps simplify routine aquarium maintenance.

Premium Ultra-Clear Glass & Reinforced Construction

The REEFER 300 G3+ features a stunning ultra-clear glass display designed to showcase vibrant fish, corals, and aquascaping with exceptional clarity.

The front, side, and bottom glass panels are constructed using 12mm (0.47") glass, while the rear panel uses 10mm (0.39") glass.

All panels are bonded with high-quality euro-silicone, while reinforced eurobracing provides additional structural support.

The aquarium rests on an aluminum-supported cabinet with a modern floating appearance, offering both strength and contemporary styling.

Redesigned High-Flow Plumbing

The G3+ platform features redesigned hydrodynamic plumbing engineered to provide improved water circulation while reducing energy consumption.

The updated flow system delivers up to 50% more water circulation compared with the previous plumbing design.

A high-precision gate valve allows fine adjustments to the overflow, helping achieve quiet, consistent operation.

A single 25mm return outlet distributes water back into the display, supporting a single return-pump configuration.

Versatile REEF-SPEC Sump

The included 14.3-gallon REEF-SPEC sump provides a flexible foundation for your preferred filtration equipment.

Features include:

• ReefMat-ready mechanical filtration area

• Adjustable protein skimmer chamber

• Integrated bubble trap

• Slide-in refugium divider

• Flexible space for additional filtration equipment

The sump is designed to accommodate a variety of filtration configurations, allowing reefkeepers to customize their system based on their preferred equipment and livestock requirements.

Convenient Cabinet & Equipment Management

The modern aquarium cabinet combines clean styling with practical access to the sump, plumbing, and filtration equipment.

Its aluminum-supported construction provides a stable foundation while maintaining the attractive floating appearance of the REEFER G3+ series.

What's Included

The REEFER 300 G3+ comes with the following:

• REEFER 300 G3+ ultra-clear glass aquarium

• Reinforced aquarium cabinet

• 14.3-gallon REEF-SPEC sump

• Complete plumbing with high-precision gate valve

• ReefControl Lite Controller

• Digital ATO module with integrated temperature sensor

Equipment Sold Separately: Aquarium lighting, circulation pumps, return pump, protein skimmer, automatic roller filter, and optional monitoring probes.

Aquarium Specifications

Specification	Details
Manufacturer	Red Sea
Model	REEFER 300 G3+
Display Volume	65 Gallons
Sump Volume	14.3 Gallons
Total System Volume	79.3 Gallons
Display Dimensions	35.4" L × 22.6" W × 21.7" H
Overall System Height	55.9"
Front Glass Thickness	12mm (0.47")
Side Glass Thickness	12mm (0.47")
Bottom Glass Thickness	12mm (0.47")
Rear Glass Thickness	10mm (0.39")
Glass Type	Ultra-Clear Glass
Bracing	Eurobrace
Return Outlets	1 × 25mm
Return Pump Configuration	Single
Cabinet Structure	Aluminum Support with Plywood Cabinet
Available Cabinet Colors	Black or White
Included Controller	ReefControl Lite
Manufacturer Warranty	Up to 5 Years

Manufacturer Warranty

Red Sea provides a standard 3-year manufacturer warranty on REEFER G3 aquariums.

Register your new aquarium with Red Sea within 90 days of purchase to receive an additional two years of coverage at no extra cost, for a total of up to five years.

Warranty coverage is subject to Red Sea's terms and conditions.

Build Your Dream Reef with Lush Corals

At Lush Corals, we understand that every reef aquarium is unique. Our team can help you select the right lighting, circulation pumps, filtration equipment, and livestock to create a system tailored to your reefkeeping goals.

Whether you're setting up your first premium reef aquarium or upgrading an established system, we're here to help you make the most of your Red Sea REEFER 300 G3+.