The Red Sea REEFER™ 425 G3 is a premier, large-format reef system designed for
the serious hobbyist who demands both impressive size and structural integrity. This
system provides a spacious 114.4-gallon total volume, supported by a reinforced Euro-
Braced design and the integration of cutting-edge smart technology.
Built on the G3 platform, the REEFER 425 is quiet, high-performing, and seamlessly
compatible with the Red Sea smart ecosystem, all controlled via the ReefBeat™ App.
G3 Key Features
 Euro-Braced Construction: The Reefer 425 G3 features Euro-bracing along
the top edge. This reinforced structure provides exceptional strength and
durability.
 Integrated ReefATO+ System: The G3 models include the cutting-edge, app-
controlled ReefATO+ as standard. This highly reliable 3-in-1 smart device
ensures:
o Stable Salinity via a precise Auto Top-Off system (solid-state sensor).
o Accurate digital Temperature Monitoring.
o Highly sensitive Leak Detection (titanium probes).
 Next-Level Water Management: The plumbing system is fully redesigned for
superior quietness and efficiency.
o ReefGate™ High-Precision Valve: A bespoke gate valve on the main
downpipe allows for minute, easy adjustments, guaranteeing stable water
levels and achieving near-silent operation.
o Optimized Flow & Dual Returns: Features dual side-facing return outlets
and hydrodynamically superior piping to deliver up to 50% more water
circulation and optimal water distribution throughout the long display tank.
 Ultra-Clear Glass: Enjoy vibrant, distortion-free viewing of your reef through
thick, beveled-edge glass, engineered for a modern, sleek look.
 ReefMat-Ready Sump: The professional REEF-SPEC glass sump features a
dedicated mechanical filtration compartment perfectly sized for plug-and-play
installation of a Red Sea ReefMat automatic fleece roller filter (sold separately)
or standard filter cups/media.
 Fortified Cabinet: A sleek, marine-spec cabinet constructed from extra-fortified
laminated plywood with leveling feet ensures long-term stability and moisture
resistance.

 Assembly-Ready Plumbing: Includes all pre-cut, quick-connect piping,
eliminating the need for messy gluing or cutting during setup.

REEFER 425 G3 Specifications
Feature Imperial (Approx.)
Display Tank Volume 90.6 Gallons
In-Cabinet Sump Volume 24 Gallons
Total System Volume 114.4 Gallons
Display Tank L x W x H 47.2" x 23.6" x 21.7"