Red Sea REEFER MAX S-850 G3 Aquarium System (180 Gal)

The Red Sea REEFER MAX S-850 G3 is a complete, ready-to-run reef aquarium system built around a large, deep rimless ultra-clear glass display, a marine-spec cabinet, and Red Sea's full suite of G3 hardware, all managed from the ReefBeat app. The S-series pairs a 70 inch length with serious front-to-back depth (26.8 inches) and height, giving you room to build dramatic reef structures and grow SPS colonies. With a 179.6 gallon display and a 224.5 gallon total volume, every pump, skimmer, and roller stays hidden below.

What's Included

• REEFER S-850 G3 aquarium in ultra-clear, beveled-edge glass with a rimless low-profile black overflow and reinforced eurobracing
• Marine-spec cabinet (choice of Black or White) with a slide-out control panel
• Sump with pre-glued, ready-to-run plumbing
• 3x ReefLED G2 170 LED lights with mounting arms
• 1x REEFER DC 900 DC protein skimmer
• 2x ReefWave 45 gyre circulation powerheads
• 1x ReefRun 12000 DC return pump with ReefRun controller
• 1x ReefMat 1200 automatic filter roller
• 1x ReefATO+ automatic top-off system

Specifications

Choose Your Stand Color

The REEFER MAX S-850 G3 is available with a Black or White marine-spec cabinet. Select your color above. Both finishes use the same water-resistant, laminated construction built to stand up to a saltwater environment.

Recommended Pairings

Round out your build with quality salt, rock, and reef gear. Ask our team about aquascaping rock, live sand, salt mix, test kits, and the additives you will want on hand for a successful cycle and long-term reef care.

Frequently Asked Questions

Is this really plug-and-play?
Yes. The S-850 G3 ships with the pump, skimmer, powerheads, filter roller, ATO, and lighting matched to the system. You assemble the cabinet and tank, connect the pre-glued plumbing, add rock, salt, and water, and configure everything through the ReefBeat app.

What makes the S-series different?
The S in REEFER S-850 means a deeper, taller aquarium. At 26.8 inches front to back and 25.6 inches tall it offers far more aquascaping depth than a standard REEFER of similar length, ideal for building dramatic reef structures and growing SPS colonies. It runs a full MAX hardware suite scaled to the volume: 3x ReefLED G2 170, REEFER DC 900 skimmer, 2x ReefWave 45, ReefRun 12000, and ReefMat 1200.

Can I pick it up or have it delivered?
This system is set up for in-store pickup at our shop, and we can also arrange direct freight delivery to your location. Contact us for a freight quote before ordering. If it is not currently in stock we can bring one in as a special order.