Natural Seawater Supplier



About our Company

We are the market leader in supplying Natural Seawater throughout the Northern Ireland & borders. We supply Natural Seawater to fish customers in the UK by 1l,5l jars via postage, as well as delivering directly to customers’ every day of the week. 

Our business is continuously growing,  as the marine industry is taking acknowledgement of the astonishing effects that our water as on the home aquarium. Our goal is to be able to provide all aquarists’ seawater and allow the hobby to grow into a more stable and easy to maintain experience that everyone can enjoy. 

The Natural Seawater

We pride ourselves on not just being able to supply live seawater that holds healthy bacteria and microorganisms that allow aquariums to thrive, but also maintaining pristine water conditions. 

Natural seawater allows for the highest possible water conditions that will encourage both fish and coral to thrive in captivity. The benefits include an enhanced and very quick cycling process, as the seawater holds over 11 million forms of live bacteria per gallon, that will be absorbed into your rocks and corals, enriching your water to natural conditions. Additionally, seawater is enriched with all the proper and well established solutions such as; Calcium, Iodine, Magnesium, Cobalt Potassium and Zinc. It will also Maintain a proper pH by providing improved buffering capacity.

Common parameters of our natural seawater are:

Salinity 1.024-1.026, Nitrates 0-0.9, Nitrite 0, Calcium 400-450ppm, Alkalinity 7.6-8.6dKH, Ammonia 0, PH 8.1-8.3, Magnesium 1250-1350ppm, Phosphate 0-0.04ppm, Silicate 0-0.1.
(Slight changes will occur throughout the year, but will always be within our acceptable benchmarks)


Our Services

Natural Seawater

Our natural seawater is swimming with millions of tiny microbes, bacteria, phytoplankton, and zooplankton. These fundamental elements are key to developing fish and coral that thrive in the ocean, and this can now be replicated in your home aquarium.

From 17p per litre or £4 + VAT per 25 Litres drum from our store

Water Containers

We use and sell high density polyethylene certified food grade 25 litre plastic containers. These are great for transporting seawater as they will not cause any contamination and are suitable for stacking, which allows for easy and simple storage.

£7.50 + vat per Container to buy(For rental of drums deposit may be required)

Delivery Service

We not only sell natural seawater but also provide a 5 days a week fast and reliable delivery service. We are diverse, and can deliver to suit your needs. Whether its your containers being filled, or your aquarium on a third floor flat being pumped, we will always try to be able to satisfy your needs. 

We try to make the delivery service as cheap as possible for our customers,

Prices From 17p per Litre plus milage costs may apply! for a quote please contact us.

Aquarium Maintenance

Whether weekly, bi-weekly, monthly, or serviced as needed, all of our clients are scheduled in an organized and orderly fashion. We provide information on all fish and coral compatibility, water chemistry, and the components needed to run your system. Factors that will alter our maintenance plans include: tank size, equipment, amount of fish and coral, as well as the involvement of the client.

By choosing Fermanagh Aquatics as your maintenance service, you can expect a professional aquarium technician to help make your reef tank experience both convenient and enjoyable. Rest assured, we hand pick all of the healthiest livestock and quarantine them before they are placed in your tank. We meticulously track each service, taking note of what was done, livestock and supplies added, as well as any other special measures taken to ensure the health of your tank.


Common maintenance requirements are:

  • Weekly, bi-weekly, monthly maintenance

  • Commercial and residential service

  • Set-up and installs

  • Removals

  • Fish sitting (while you are on vacation)

  • 24 hour emergency service