Red Sea REEFER 425 G3+ Aquarium System – 91 Gallons

A Premium, Customizable Reef Aquarium with Advanced Smart Control

The Red Sea REEFER 425 G3+ combines exceptional aquarium craftsmanship, reinforced construction, and intelligent monitoring technology into a premium reef-ready saltwater aquarium system.

Featuring a spacious 90.6-gallon ultra-clear glass display, a 23.8-gallon sump, and Red Sea's ReefControl Pro technology, the REEFER 425 G3+ offers an excellent foundation for creating a customized aquarium.

Its 47.2-inch display provides generous space for aquascaping and a variety of corals and marine fish, while the G3+ generation introduces redesigned plumbing, smart water-level management, and enhanced construction.

Unlike the fully equipped MAX configuration, the standard REEFER 425 G3+ allows you to choose the lighting, circulation pumps, return pump, protein skimmer, and filtration equipment that best suit your reefkeeping goals.

Key Features

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

• Ultra-Clear Glass Construction – Premium glass bonded with high-quality euro-silicone

• Reinforced Eurobracing – Additional structural support with a modern appearance

• ReefControl Pro Controller Included – Connected monitoring and expandable automation

• Digital Automatic Top-Off Included – Water-level management with integrated temperature sensor

• Redesigned High-Flow Plumbing – Improved circulation efficiency

• Dual 25mm Return Outlets – Supports single or dual return pumps

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

• Reinforced Cabinet – Floating-style appearance with aluminum support

• Customizable Equipment Configuration – Select your preferred lighting, pumps, and filtration

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

Advanced ReefControl Pro Technology

The included ReefControl Pro provides centralized monitoring and control for compatible Red Sea equipment through the ReefBeat app.

Features include:

• Support for up to seven compatible ReefSense probes and sensors

• Connections for two compatible 12V DC devices

• ReefBeat app connectivity

• Expandable aquarium monitoring and automation

The included digital ATO module automatically replaces evaporated freshwater and incorporates a temperature sensor.

Additional ReefSense monitoring probes, including pH monitoring, are available separately.

Premium Ultra-Clear Glass & Reinforced Construction

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

The aquarium is constructed using 12mm front, bottom, and rear glass, with 15mm side panels.

High-quality euro-silicone bonding and reinforced eurobracing provide additional structural support.

The modern cabinet combines contemporary styling with practical access to the sump and equipment.

Redesigned High-Flow Plumbing

The G3+ platform incorporates redesigned hydrodynamic plumbing designed to improve circulation efficiency while reducing energy consumption.

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

Two 25mm return outlets support either single or dual return-pump configurations, offering flexibility when building your custom system.

Versatile REEF-SPEC Sump

The included 23.8-gallon REEF-SPEC sump provides a spacious foundation for filtration equipment.

Features include:

• ReefMat-ready mechanical filtration

• Adjustable protein skimmer chamber

• Integrated bubble trap

• Slide-in refugium divider

• Space for additional filtration equipment

What's Included

• REEFER 425 G3+ ultra-clear glass aquarium

• Reinforced aquarium cabinet

• 23.8-gallon REEF-SPEC sump

• Complete plumbing with high-precision gate valve

• ReefControl Pro 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

Manufacturer Warranty

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

Register your new 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, our team can help you select compatible lighting, pumps, filtration equipment, and quality livestock to create a custom aquarium tailored to your reefkeeping goals.

Whether you're building a mixed reef or upgrading to a larger display, the Red Sea REEFER 425 G3+ provides an outstanding foundation.