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Red Sea Reefer 3XL 900 Aquarium

Availability: In stock


Quick Overview

With a net operating volume of 900 liter / 240 gal, the new REEFER 3XL 900 is an impressive reef system that provides unsurpassed depth and dimension to the reefscaping. 200cm / 79” long, and 65cm / 25.6” high and wide, the REEFER 3XL 900 gives hobbyists the freedom to create a truly spectacular reef.

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Free Red Sea Skim 900

Red Sea Reefer 3XL 900 Aquarium

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NEW - Red Sea 3XL 900 REEFER™ Systems

Rimless Reef Ready Systems for advanced hobbyists

REEFER™ Concept

Red Sea’s REEFER™ series of Reef Systems, provide advanced hobbyists with a solid foundation for building a fully featured reef or marine aquarium.

The REEFER™ series combines a contemporary, rimless, ultra-clear glass aquarium with a stylish cabinet and a comprehensive water management system, including a professional sump with integrated automatic top-up, and Red Sea’s unique silent down-flow system.


Incorporating technologies originally developed for Red Sea’s all-in-one MAX® coral reef systems, the REEFER™ series is designed for ease of operation while enabling the advanced hobbyist to install an unlimited choice of lighting, filtration, circulation and controllers to create a uniquely customized system.


Features of the Red Sea 3XL REEFER include:

REEFER 3XL 900 – What’s included:



•Rimless, 19mm / ¾” super-clear, beveled edge glass aquarium

•Elegant, reinforced plywood Marine-Spec cabinet with aluminum support

•Dual side-facing return pump outlets with fittings for one or two pumps

•Enlarged overflow box for increased surface skimming

•Unique split sump system for unsurpassed flexibility:

◦Professional refugium-ready main sump with variable height skimmer chamber and micron filter bags and media cups

◦Extension sump (60 liters/ 16 gal) can be used as a dedicated frag-tank or refugium. Alternatively, it can be disconnected and used as an independent reservoir of 83 liters / 22 gal.



•4 units of ReefLED 90 lighting with bespoke mounts (Deluxe models only)

•A silent, regulated down-flow system with emergency overflow

•Assembly-ready piping – no gluing required


3XL REEFER™ Specification

REEFER™ aquariums are constructed from thick, beveled-edge, ultra-clear glass to support their elegant and modern rimless design. The aquarium sits on a recessed base that “floats” it above the cabinet, which seamlessly follows the contour of the glass.

The marine-spec laminated cabinet that houses the sump, (and in the larger models also includes a dedicated, vented space for chillers) is smartly finished with weatherproof, epoxy-painted doors.

REEFER™ Water Management System

Removable surface-skimming combs surround the top of the centrally located overflow box that houses the downpipe, sump return pipe and the discreet multi-directional “eyeball” return outlet nozzle.   In the event of a blockage in the regulated downpipe, an additional emergency overflow pipe provides an unrestricted free flow of aquarium water directly to the sump.

On entering the sump the water passes through a 200 micron mechanical filter bag, before entering the filtration compartment that maintains a constant water height, making it suitable for all skimmers and other reactors. In order to remove any air bubbles that may have escaped from the skimmer, the water passes through a bubble-stripping cascade on its way to the return pump chamber.

To ensure a constant water level in the pump compartment, all XXL REEFER™ sumps include an integrated automatic freshwater top-up unit,  guaranteeing a constant, stable water flow throughout the complete system.

Supplied as a complete self-assembly kit, all pipe work is ready without the need for any gluing.


Features include:

  • Micron filter bags and filter media cups *

Easy to set-up

With the flexibility to complete your marine system with equipment of your choice