REEFER G3+ systems come with elegant jet-black eurobracing, ultra-clear glass bonded with high-quality euro-silicone, a high-precision gate valve, hydrodynamically superior piping, and are fully supported by reinforced marine-spec cabinets. They also include the advanced ReefControl ATO module, the base for all your aquarium monitoring needs. REEFER G3+ systems come with an extended warranty of up to 5 years.
Plan a reef across a 120 cm display with a 60 cm front-to-back dimension, giving you room to build depth into your aquascape. The Red Sea REEFER 425 G3+ combines a 343 litre display with an in-cabinet sump, providing a manufacturer-rated total system water volume of 433 litres. Its 120 x 60 x 55 cm display gives you a defined space to plan rockwork, coral placement and swimming areas. As part of the G3+ range, it brings together the aquarium, cabinet, sump, plumbing and automatic top-up controls in a reef-ready foundation that you can equip to suit your reef.
Ultra-clear glass provides a clear view of your aquascape, with 12 mm front glass and 15 mm side glass. High-quality euro-silicone bonds the glass, while the black eurobracing reinforces the aquarium. The marine-spec plywood cabinet has laminated panels, epoxy-painted doors, stainless-steel hinges and adjustable levelling feet. These features combine a finished furniture appearance with access to the sump below.
The G3+ water-management design uses hydrodynamic piping and the ReefGate precision gate valve. Adjusting the downflow through the valve helps you balance the drain against your chosen return pump and reduce operating noise. The enlarged downflow inlet is designed to reduce turbulence, while the removable surface-skimming combs make the overflow easier to clean. This model has two 25 mm return outlets and supports single- or dual-pump plumbing configurations.
The in-cabinet sump places filtration equipment below the display. Its adjustable-height skimmer chamber lets you set the operating water depth to suit the requirements of your chosen protein skimmer. The mechanical filtration section includes two filter socks and two media cups. The removable mechanical filtration compartment makes the sump ReefMat-ready, so you can add a compatible automatic roller filter as an upgrade. A refugium-ready layout also gives you the option to incorporate a refugium into your filtration plan.
ReefControl Pro and the ATO Module are included. Automatic freshwater top-up replaces water lost through evaporation, helping maintain the system water level and salinity, while integrated temperature monitoring supports day-to-day checks. The Pro controller supports up to seven ReefSense probes or sensors and two 12 V DC devices. You can expand monitoring and control with optional compatible ReefSense devices and ReefControl Power as your setup develops.
Technical specifications
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Specification
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Details
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Total system water volume
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433 litres
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Display tank water volume
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343 litres
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In-cabinet sump water volume
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90 litres
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Display dimensions L x W x H
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120 x 60 x 55 cm
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Total system height
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142 cm
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Front glass thickness
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12 mm
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Side glass thickness
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15 mm
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Bottom glass thickness
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12 mm
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Return outlets
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2 x 25 mm (Single or dual pump)
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Skimmer chamber footprint
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36 x 48 cm
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Pump chamber footprint
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31 x 24 cm
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Sump operating water height
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20-27 cm
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ReefControl controller
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Pro with ATO Module
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Refugium-ready sump
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Yes
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Split sump
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No
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Mechanical filter socks
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2
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Media cups
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2
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Cabinet frame
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Marine-spec plywood
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Slide-out control panel
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Not included
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Manufacturer warranty
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3 years; extended to 5 years with registration within 90 days, subject to terms
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