Description

Red Sea Reefer 725 G3 Reef Aquarium System

The Red Sea Reefer 725 G3 reef aquarium system is the largest system in Red Sea’s REEFER G3 range. This reef-ready aquarium platform features ultra-clear rimless glass, advanced G3 plumbing, a large ReefMat-ready sump, and integrated smart ATO preparation. It provides a professional foundation for building very large, high-stability marine reef aquariums.

Product Overview

The Red Sea Reefer 725 G3 reef aquarium is designed for experienced reef keepers who want maximum water volume, exceptional biological stability, and expansive aquascaping potential. It offers outstanding flexibility for advanced filtration and circulation equipment, making it ideal for large coral-dominated and SPS-focused reef systems. As part of the G3 range, it delivers professional-level performance and long-term reliability.

Dimensions & Volumes

Display Tank Dimensions
• Length: 200 cm
• Width: 60 cm
• Height: 60 cm

Cabinet & Overall Height
• Overall system height (tank + cabinet): approx. 145 cm

Water Volume
• Display tank volume: approx. 575 litres
• In-cabinet sump volume: approx. 150 litres
• Total system volume: approx. 725 litres

Cabinet Construction & Build Quality

The Red Sea Reefer 725 G3 cabinet is constructed from marine-spec laminated plywood, engineered for long-term durability in saltwater environments. Adjustable levelling feet ensure precise installation, while the extra-large cabinet interior provides generous space for the sump, plumbing, and advanced reef equipment.

Flow System & Plumbing

The Reefer 725 G3 reef aquarium uses Red Sea’s G3 hydrodynamic plumbing system to deliver powerful yet quiet water circulation throughout the aquarium.

• Precision-engineered silent downflow system
• High-accuracy Red Sea gate valve for precise flow control
• Optimised G3 plumbing layout for smooth, stable circulation
• Designed to support a wide range of return pump options (pump not included)

Glass & Structural Features

• Ultra-clear rimless glass front and side panels
• Reinforced construction for maximum strength and stability
• Large display footprint for advanced aquascaping and coral growth
• Professional ReefMat-ready sump suitable for mechanical filtration, skimmer, and refugium configurations

Included Features

The Red Sea Reefer 725 G3 reef aquarium system is supplied as a reef-ready base system, allowing complete freedom to customise lighting, filtration, and circulation equipment.

Included as standard:
• Ultra-clear rimless glass display tank
• Large professional ReefMat-ready sump system
• Integrated ReefATO+ smart auto top-off preparation
• Complete G3 plumbing and overflow system
• Marine-spec cabinet with adjustable levelling feet

Not included (user-selectable):

• Lighting (LED fixtures optional)
• Return pump
• Protein skimmer
• Circulation pumps
• ReefMat / filter media

Warranty

The Red Sea Reefer 725 G3 reef aquarium is eligible for Red Sea’s extended warranty of up to 5 years when registered. The warranty covers manufacturing defects in materials and workmanship, subject to Red Sea’s registration requirements and usage terms.