A Beginner’s Guide to DIY Aquaponics
PVC Pipe Sizes for Aquatics - How They Work
How to Cycle a Fish Tank
Our Favourite Exotic Freshwater Fish For Beginners
How to Care for a Goldfish
4 Fun Fish Alternatives to Keep in an Aquarium
How To Keep An Aquarium Cool In Hot Weather
Aquarium Water Treatments to Keep Your Fish Healthy
5 Ways to Keep Freshwater Fish Healthy and Happy
Tropical Aquarium Supplies for Every Tank
Feeding your Fish the Correct Food
Introducing New Fish to an Established Tank
Your Fish Tank Starter Kit
What Are Marine Protein Skimmers?
What Are the Most Popular Tropical Fish Species?
What is the Difference Between a Tropical and Marine Tank?
What is an Air Stone?
Aquarium Supplies to Refresh your Tank this Spring
How Often Should You Feed Fish
7 Reasons you Should Keep Fish as Pets
Why is my Fish Tank Water Cloudy?
How to Get Rid of Fish Tank Algae
Holiday Fish Food for Your Aquarium
Our Favourite Ways to Update Your Fish Tank
What Are the Best Aquarium Fish for Beginners?
How Often Should You Clean Your Fish Tank?
What to Know When Setting Up a New Fish Tank
How to Maintain a Tropical Fish Tank
HOW TO LOWER pH IN AN AQUARIUM AND ITS IMPORTANCE
Identify, Prevent & Treat Freshwater Aquarium Diseases
CLEANING A FRESHWATER AQUARIUM
(FISH)FOOD FOR THOUGHT: THE BASICS OF AQUARIUM FISH FEED
UNUSUAL TROPICAL FISH FOR YOUR FRESHWATER HOME AQUARIUM
Your Useful Guide to Buying a Fish Tank
Why add good bacteria to your aquarium or pond filter?
How To Set Up An Aquarium For Your Tropical Fish
Maintaining A Cold Water Aquarium
Top Tips For Maintaining Your Fish Tank
Aquarium Supplies Guide
5 Key Things to Consider When Choosing Your Aquarium Fish
Cleaning a Freshwater Aquarium

Marine RO Units

Marine RO Units are Reverse Osmosis units used for water purification in aquariums. Purifying the water for your fish can be crucial for their survival, as they need certain conditions in order to thrive and remain healthy.

We offer the marine RO units and the aquarium equipment and accessories necessary for a well-functioning RO unit and good water purification.

Marine RO Units

SORT BY:

Replacement RO Unit Membrane 10"

From £33.24

RO 10" Sediment Cartridge

£3.49

RO 10" Carbon Cartridge

£6.24

1/4" Tee For RO Pipe

£1.50

Aquarium Supplies

A Beginner’s Guide to DIY Aquaponics

PVC Pipe Sizes for Aquatics - How They Work

How to Cycle a Fish Tank

Our Favourite Exotic Freshwater Fish For Beginners

How to Care for a Goldfish

4 Fun Fish Alternatives to Keep in an Aquarium

How To Keep An Aquarium Cool In Hot Weather

Aquarium Water Treatments to Keep Your Fish Healthy

5 Ways to Keep Freshwater Fish Healthy and Happy

Tropical Aquarium Supplies for Every Tank

Feeding your Fish the Correct Food

Introducing New Fish to an Established Tank

Your Fish Tank Starter Kit

What Are Marine Protein Skimmers?

What Are the Most Popular Tropical Fish Species?

What is the Difference Between a Tropical and Marine Tank?

What is an Air Stone?

Aquarium Supplies to Refresh your Tank this Spring

How Often Should You Feed Fish

7 Reasons you Should Keep Fish as Pets

Why is my Fish Tank Water Cloudy?

How to Get Rid of Fish Tank Algae

Holiday Fish Food for Your Aquarium

Our Favourite Ways to Update Your Fish Tank

What Are the Best Aquarium Fish for Beginners?

How Often Should You Clean Your Fish Tank?

What to Know When Setting Up a New Fish Tank

How to Maintain a Tropical Fish Tank

HOW TO LOWER pH IN AN AQUARIUM AND ITS IMPORTANCE

Identify, Prevent & Treat Freshwater Aquarium Diseases

CLEANING A FRESHWATER AQUARIUM

(FISH)FOOD FOR THOUGHT: THE BASICS OF AQUARIUM FISH FEED

UNUSUAL TROPICAL FISH FOR YOUR FRESHWATER HOME AQUARIUM

Your Useful Guide to Buying a Fish Tank

Why add good bacteria to your aquarium or pond filter?

How To Set Up An Aquarium For Your Tropical Fish

Maintaining A Cold Water Aquarium

Top Tips For Maintaining Your Fish Tank

Aquarium Supplies Guide

5 Key Things to Consider When Choosing Your Aquarium Fish

Cleaning a Freshwater Aquarium

Marine RO Units

Marine RO Units

Replacement RO Unit Membrane 10"

RO 10" Sediment Cartridge

RO 10" Carbon Cartridge

1/4" Tee For RO Pipe