Aqua One ReefSys 255 Marine Aquarium

Build Your Own Reef, Your Way

The Aqua One ReefSys 255 is an open-top marine aquarium system designed to give reef hobbyists the flexibility and control needed to establish and grow a personalised underwater ecosystem.

Constructed from premium low iron opti-clear glass and paired with a sleek modern cabinet, the ReefSys 255 combines contemporary design with practical reef functionality. With its customisable sump system, quiet plumbing and high-flow capability, this aquarium provides a reliable foundation for everything from marine fish displays to thriving coral systems.

Whether you are upgrading your current setup or building a reef from the ground up, the ReefSys 255 is engineered to grow alongside your reef keeping ambitions.

Designed For Complete Reef Flexibility

The ReefSys range is built around one simple idea — ultimate control.

Rather than limiting you to a fixed filtration layout, the ReefSys 255 allows you to customise your system using your preferred filtration equipment and maintenance approach.

The modular sump design provides the freedom to configure:

• Protein skimmers
• Reactors
• Mechanical filtration
• Media chambers
• Future equipment upgrades

With two adjustable sump baffles, including one movable divider, the filtration layout can adapt as your reef system evolves.

This flexibility makes the ReefSys 255 ideal for hobbyists wanting a system that supports both current needs and long-term reef development.

Premium Construction With Clean Modern Styling

Built using high quality low iron opti-clear glass, the ReefSys 255 delivers outstanding clarity and true-to-life colour viewing, allowing your fish, corals and aquascape to become the centrepiece of the room.

The rimless, open-top design creates a clean and minimalist appearance while providing easy access for feeding, maintenance and aquascaping.

A sleek gloss cabinet, available in black or white, keeps filtration and equipment hidden while maintaining the premium aesthetic expected from a modern reef aquarium.

Engineered For Quiet, Reliable Performance

The ReefSys 255 is designed to handle the demands of long-term marine and coral keeping while maintaining quiet day-to-day operation.

Its integrated overflow and plumbing system includes features specifically designed to improve reliability and reduce maintenance concerns.

Filtration & Overflow Features

• Low splash sock silencers help minimise filtration noise
• Quiet plumbing design supports silent operation
• High-flow overflow system designed to manage strong circulation
• Overflow lid reduces algae growth inside the overflow box and prevents fish entering the plumbing area
• Backup emergency drain provides added protection against overflow events

Together, these features create a system designed for both performance and peace of mind.

Key Features & Benefits

• High quality low iron opti-clear glass for superior clarity and true colour viewing
• Modular sump system allows complete filtration customisation
• Two adjustable sump baffles, including one movable divider
• Low splash sock silencers for quieter filtration
• Overflow lid reduces algae growth and protects livestock
• Emergency backup drain helps prevent overflow
• Designed for high flow rates
• Rimless and open-top design for easy access
• Quiet plumbing system
• Gloss black or white cabinet keeps equipment hidden
• Easy to set up and maintain
• 1 Year Guarantee

Specifications

Ideal For

The ReefSys 255 is perfectly suited for:

• Marine fish-only aquariums
• Mixed reef systems
• LPS coral displays
• Soft coral aquariums
• Reef keepers wanting equipment flexibility
• Intermediate to advanced hobbyists

A Reef System Built To Grow With You

The Aqua One ReefSys 255 offers the perfect balance of premium design, flexible filtration and dependable marine performance.

With customisable sump filtration, crystal-clear low iron glass and a sleek cabinet finish, the ReefSys 255 provides everything needed to create a reef aquarium that reflects your own vision and grows with your experience.