Red Sea REEFER™ XL Rimless Aquarium Systems
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Red Sea

 Red Sea 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.  

Red Sea REEFER™ XL Concept

The new REEFER™ XL 425 and REEFER™ XL 525 models are both 7.5cm/3″ wider than the regular REEFER™ 350 & 450, enabling you to create substantial aquascaping while still providing plenty of water volume and space for your aquarium inhabitants. Both also feature proportionately larger sumps with an extra 3cm / 1.2″ water height in the skimmer chamber.


Red Sea REEFER™ XL Features:

  • Rimless, ultra-clear, beveled edge glass aquarium
  • Elegant Marine-Spec cabinet
  • Professional sump with constant height skimmer chamber and micron filter bags
  • Silent, regulated down-flow system with emergency overflow
  • Integrated automatic top-up system with reservoir
  • Assembly-ready piping – no gluing required

REEFER™ XL 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 vented space for chillers, is smartly finished with weatherproof, epoxy-painted doors. Offered with black or white exteriors, all cabinets have a black interior which maintains its clean appearance over time.

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 225 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 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.

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System Volumes

Model Tank water (L) Sump water (L) Total (L) RO (L)
425 332 (88 gal) 90 (24 gal) 422 (112 gal) 12 (3.2 gal)
525 409 (L108 gal) 116 (31 gal) 525 (139 gal) 1 6.5 (4.3 gal)

System Dimensions

Model Tank Length (cm) Tank Height (cm) Tank Width (cm) Total Height With Cabinet (cm)
425 120 (47″) 55 (22″) 57.5 (22.6″) 142 (56″)
525 150 (59″) 55 (22″) 57.5 (22.6″) 142 (56″)

Sump Dimensions

Model Water Height (cm) Skimmer Chamber (cm) Pump Chamber (cm)
425 27 (10.6”) 49 x 34 (19.3”x13.4”) 49 x 15 (19.3”x6”)
525 27 (10.6”) 49 x 48 (19.3”x19.3”) 49 x 15 (19.3”x6”)

Return Pump

Model 3/4” threaded hose barb – Pipe Int. Dia Recommended flow (lph)
(pump not included)
425 25mm (1”) 4000 (1060 gph)
525 25mm (1”) 4000 (1060 gph)