Red Sea REEFER MAX 425 G3+ Aquarium System – 91 Gallons

A Premium, Fully Equipped Reef Aquarium with Advanced Smart Control

The Red Sea REEFER MAX 425 G3+ combines premium aquarium craftsmanship, powerful reefkeeping equipment, and intelligent automation into one complete saltwater aquarium system.

Featuring a 90.6-gallon ultra-clear glass display, a 23.8-gallon sump, and Red Sea's ReefControl Pro technology, the REEFER MAX 425 G3+ is designed for reefkeepers who want a spacious reef aquarium with coordinated equipment and simplified management.

The MAX configuration includes ReefLED G2 lighting, ReefWave circulation pumps, ReefRun return pump, ReefMat automatic filtration, DC protein skimmer, and integrated monitoring and automatic top-off—all designed to work together through Red Sea's ReefBeat ecosystem.

Whether you're creating a colorful mixed reef, SPS-dominant aquarium, or an impressive fish and coral display, the REEFER MAX 425 G3+ provides the space, performance, and flexibility to bring your vision to life.

Key Features

• 114.4 Gallons Total System Volume – 90.6-gallon display with 23.8-gallon sump

• Ultra-Clear Glass Construction – Reinforced eurobracing and premium glass

• ReefControl Pro Controller – Smart monitoring with included pH and temperature probe

• 2 × ReefLED G2 115 Lights – High-performance reef lighting

• 2 × ReefWave 45 Pumps – Wide cross-flow circulation up to 3,960 GPH each

• ReefRun G2 6000 Return Pump – Adjustable DC return flow

• ReefMat 500 Roller Filter – Automatic mechanical filtration

• REEFER DC 600 Protein Skimmer – Efficient skimming with self-leveling technology

• Digital Automatic Top-Off – Water-level management with temperature monitoring

• Slide-Out Control Panel 60 – Organized access to aquarium electronics

• Up to 5-Year Manufacturer Warranty – With qualifying registration

Advanced ReefControl Pro Technology

The G3+ generation introduces Red Sea's ReefControl Pro, providing centralized monitoring and automation through the ReefBeat app.

The included system features:

• ReefSense pH and temperature probe

• Digital ATO module with integrated temperature sensor

• Support for up to five additional compatible ReefSense probes and sensors

• Connections for two compatible 12V DC devices

• ReefBeat app connectivity

The connected system makes it easier to manage compatible aquarium equipment and monitor important water conditions.

Premium Ultra-Clear Glass & Reinforced Construction

The REEFER MAX 425 G3+ features ultra-clear glass designed to showcase vibrant corals, fish, and aquascaping.

The aquarium uses 12mm front, bottom, and rear glass, with 15mm side panels.

High-quality euro-silicone and reinforced eurobracing provide structural support while maintaining a clean, contemporary appearance.

The aquarium rests on a reinforced cabinet designed for convenient access to filtration equipment and electronics.

Redesigned High-Flow Plumbing

The G3+ platform features redesigned plumbing designed for improved water circulation and energy efficiency.

A high-precision gate valve allows fine overflow adjustments for quiet, consistent operation.

Two 25mm return outlets provide flexible water distribution and support single or dual return-pump configurations.

Complete Reef-Ready Equipment Package

ReefLED G2 115 Lighting – 2 Included

Two Red Sea ReefLED G2 115 fixtures provide powerful, coral-focused lighting across the display.

ReefBeat connectivity allows convenient customization of lighting intensity, color settings, and daily schedules to support a variety of reef aquarium environments.

ReefWave 45 Circulation Pumps – 2 Included

Two ReefWave 45 pumps deliver broad cross-flow circulation throughout the aquarium.

Each pump provides up to 3,960 GPH, with customizable flow patterns that help distribute water around rockwork and corals while reducing stagnant areas.

ReefRun G2 6000 Return Pump – 1 Included

The efficient DC-powered ReefRun G2 6000 provides adjustable return flow from approximately 950 to 1,700 GPH.

ReefBeat integration allows convenient adjustments to circulation between the sump and display.

ReefMat 500 Automatic Roller Filter

The ReefMat 500 automatically advances its filter fleece to remove suspended waste and debris from aquarium water.

This helps maintain consistent mechanical filtration while reducing maintenance compared with traditional filter socks.

REEFER DC 600 Protein Skimmer

The included REEFER DC 600 efficiently removes dissolved organic waste before it breaks down in the aquarium.

Featuring approximately 400 GPH water flow and 195 GPH air flow, the skimmer provides efficient organic waste removal and aeration.

Self-leveling technology helps maintain consistent skimming performance and reduce the risk of excessive skimming.

Integrated Digital Automatic Top-Off

The included digital ATO module automatically replaces evaporated freshwater to help maintain consistent aquarium water levels and salinity.

An integrated temperature sensor provides additional monitoring through ReefControl Pro.

Versatile REEF-SPEC Sump

The included 23.8-gallon REEF-SPEC sump features an adjustable skimmer chamber, bubble trap, refugium divider, and space for the ReefMat 500 automatic roller filter.

Convenient Cabinet & Equipment Management

The reinforced cabinet combines modern styling with practical access to equipment.

An included Slide-Out Control Panel 60 provides an organized location for compatible electronics and convenient access during maintenance.

What's Included

• REEFER 425 G3+ ultra-clear glass aquarium

• Reinforced aquarium cabinet

• REEF-SPEC sump and plumbing

• ReefControl Pro Controller

• ReefSense pH and temperature probe

• Digital ATO module with integrated temperature sensor

• 2 × ReefLED G2 115 lighting fixtures

• 2 × ReefWave 45 circulation pumps

• 1 × ReefRun G2 6000 return pump

• 1 × ReefMat 500 automatic roller filter

• 1 × REEFER DC 600 protein skimmer

• 1 × Slide-Out Control Panel 60

Aquarium Specifications

Specification	Details
Manufacturer	Red Sea
Model	REEFER MAX 425 G3+
Display Volume	90.6 Gallons
Sump Volume	23.8 Gallons
Total System Volume	114.4 Gallons
Display Dimensions	47.2" L × 23.6" W × 21.7" H
Overall System Height	55.9"
Front Glass Thickness	12mm (0.47")
Side Glass Thickness	15mm (0.59")
Bottom Glass Thickness	12mm (0.47")
Rear Glass Thickness	12mm (0.47")
Glass Type	Ultra-Clear Glass
Bracing	Eurobrace
Return Outlets	2 × 25mm
Return Pump Configuration	Single or Dual
Included Controller	ReefControl Pro
Available Cabinet Colors	Black or White
Manufacturer Warranty	Up to 5 Years

Manufacturer Warranty

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

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

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

Build Your Dream Reef with Lush Corals

At Lush Corals, we understand that choosing a premium reef aquarium is a significant investment. Our team can help you plan your aquarium setup, select accessories, and choose quality livestock.

Whether you're building a beautiful new reef or upgrading an established system, we're here to help you make the most of your Red Sea REEFER MAX 425 G3+.