Red Sea REEFER S-850 G3+ Aquarium System – 180 Gallons

A Premium, Customizable Reef Aquarium with Advanced Smart Control

The Red Sea REEFER S-850 G3+ combines exceptional aquarium craftsmanship, reinforced construction, and intelligent technology into one premium reef-ready aquarium system.

Featuring a spacious 179.6-gallon ultra-clear glass display, a 44.9-gallon sump, and Red Sea's ReefControl Pro technology, the S-850 G3+ offers an impressive foundation for a custom saltwater aquarium.

Designed for reefkeepers who prefer to select their own equipment, the non-MAX configuration provides the aquarium, cabinet, sump, advanced plumbing, and integrated smart controls without requiring a predetermined lighting and filtration package.

Whether you're creating an expansive mixed reef, SPS-dominant aquarium, or impressive fish and coral display, the REEFER S-850 G3+ offers the space and flexibility to bring your vision to life.

Key Features

• 224.5 Gallons Total System Volume – 179.6-gallon display with 44.9-gallon sump

• Ultra-Clear Glass Construction – 19mm glass with reinforced eurobracing and bottom bracing

• ReefControl Pro Controller Included – Smart monitoring and expandable automation

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

• Redesigned High-Flow Plumbing – Improved circulation efficiency with precision flow adjustment

• Dual 32mm Return Outlets – Supports single or dual return pumps

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

• Aluminum-Supported Cabinet – Reinforced structure with an elegant floating appearance

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

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

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

Advanced ReefControl Pro Technology

The included ReefControl Pro provides a central platform for connected aquarium monitoring and automation.

Through Red Sea's ReefBeat app, compatible equipment and sensors can be managed from your smartphone.

Features include:

• Support for up to seven compatible ReefSense probes and sensors

• Connections for two compatible 12V DC devices

• ReefBeat app connectivity

• Expandable monitoring capabilities

The included digital ATO module automatically manages freshwater top-off and incorporates an integrated temperature sensor.

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

Premium Ultra-Clear Glass & Reinforced Construction

The REEFER S-850 G3+ features a stunning ultra-clear glass display designed to showcase vibrant fish, corals, and aquascaping with exceptional clarity.

All four vertical panels and the bottom use 19mm (0.75") glass bonded with high-quality euro-silicone.

Reinforced eurobracing and bottom bracing provide structural support for this large-format aquarium.

The display rests on an aluminum-supported cabinet combining stability, convenient equipment access, and contemporary styling.

Redesigned High-Flow Plumbing

The G3+ generation incorporates redesigned plumbing that improves water circulation efficiency while reducing energy consumption.

A high-precision gate valve allows accurate adjustments to the overflow for quiet, consistent operation.

Two 32mm return outlets support single or dual return-pump installations, allowing reefkeepers to customize flow between the display and sump.

Versatile REEF-SPEC Sump

The included 44.9-gallon REEF-SPEC sump provides flexible filtration options.

Features include:

• ReefMat-ready filtration area

• Adjustable skimmer chamber

• Integrated bubble trap

• Slide-in refugium divider

• Space for additional filtration equipment

This flexibility allows you to design your filtration system around your preferred equipment and livestock requirements.

What's Included

• REEFER S-850 G3+ ultra-clear glass aquarium

• Reinforced aquarium cabinet

• REEF-SPEC sump

• Complete plumbing with high-precision gate valve

• ReefControl Pro Controller

• Digital ATO module with integrated temperature sensor

• Slide-Out Control Panel 60

Equipment Sold Separately: Aquarium lighting, circulation pumps, return pump, protein skimmer, automatic roller filter, and additional 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, subject to Red Sea's warranty terms and conditions.

Build Your Dream Reef with Lush Corals

At Lush Corals, we can help you choose the ideal lighting, pumps, filtration equipment, and livestock for your aquarium.

Whether you're building a customized mixed reef or upgrading to a larger display, the Red Sea REEFER S-850 G3+ offers the performance, flexibility, and premium construction to support your reefkeeping goals.