Marine Aquariums & Reef Aquariums

Discover our extensive range of marine aquariums and reef tanks at Rock ’N’ Critters, your specialist marine aquarium retailer in South Wales.

Explore premium saltwater aquarium systems from Red Sea, D-D and TMC, including compact marine fish tanks, complete reef aquarium systems, peninsula displays and large marine aquariums with integrated sump filtration.

Whether you're starting your first saltwater aquarium or upgrading to a spectacular coral reef display, we'll help you find the ideal aquarium for your space, livestock and budget.

D-D Aquariums

Red Sea Aquariums

TMC Aquariums

Marine Aquariums & Reef Tanks for Every Aquarist

Create your ideal underwater world with our collection of marine aquariums, saltwater fish tanks and reef aquarium systems at Rock ’N’ Critters.

Whether you're planning a compact marine aquarium or an impressive large coral reef display, we supply premium aquarium systems from leading manufacturers, supported by specialist advice and a wide range of compatible equipment.

Red Sea Marine Aquariums

Discover Red Sea aquariums, designed to combine contemporary styling with innovative reef-keeping technology.

Explore a range of reef-ready aquarium systems with elegant glass displays, coordinated cabinets and advanced filtration options. Selected models also offer integrated equipment and smart aquarium technology.

Ideal for aquarists looking for a stylish, carefully engineered marine aquarium system.

D-D Marine Aquariums

The D-D aquarium range includes Reef-Pro, Aqua-Pro Reef, AquaFrame and Peninsula systems.

Featuring ultra-clear low-iron glass, efficient overflow designs and versatile sump filtration, D-D aquariums offer excellent flexibility for creating a personalised reef.

Choose from compact aquariums, spacious reef displays and premium aluminium-framed cabinet options.

TMC Marine Aquariums

Explore TMC marine aquariums, offering practical, attractive systems for a wide range of reef-keeping requirements.

From compact setups to larger marine aquarium displays, TMC provides options for aquarists seeking quality construction and functional aquarium design.

Choosing the Right Marine Aquarium

When selecting a saltwater aquarium, consider the available space, aquarium dimensions, livestock requirements and equipment needed to maintain a stable marine environment.

A sump-based reef aquarium offers additional room for filtration equipment, while compact systems can be ideal where space is limited.

Our experienced team can help you compare aquarium sizes, filtration systems and cabinet configurations.

Custom-Made Marine Aquariums

Can't find the aquarium you're looking for?

Rock ’N’ Critters can also assist with custom-made marine aquariums, helping you explore alternative sizes and configurations for your home or business.

Complete Your Reef Aquarium

We also stock a comprehensive range of marine aquarium equipment, including:

Reef LED lighting and mounting systems
Protein skimmers and filtration equipment
Return pumps and wavemakers
Aquarium heaters and temperature controllers
Automatic top-up and dosing systems
Marine salt, live rock, dry rock and reef sand
Aquarium test kits and water treatment products

Why Buy from Rock ’N’ Critters?

With extensive experience in marine aquarium keeping, coral husbandry and aquatic livestock, our team understands what makes a successful reef aquarium.

If you need more information on our collection of marine aquariums, please don't hesitate to contact us - or visit us in person at our aquarium showroom!