OxyCore is a premium hyper-porous biological filter media engineered to provide exceptional aerobic filtration in freshwater and marine aquariums. Designed to support large colonies of beneficial nitrifying bacteria, OxyCore helps rapidly convert harmful ammonia and nitrite into less toxic compounds, supporting a healthier and more stable aquatic environment.

Each piece of OxyCore offers significantly more usable surface area than traditional plastic biomedia, creating the ideal environment for aerobic bacteria to colonise and thrive. The rough, porous structure allows beneficial bacteria to establish extensive biofilms, maximising biological filtration efficiency and helping maintain excellent water quality.

Key Features

• Hyper-porous biomedia for advanced biological filtration
• Supports rapid removal of ammonia and nitrite
• Provides significantly greater surface area than standard plastic media
• Encourages strong colonies of beneficial nitrifying bacteria
• Suitable for freshwater and marine aquariums
• Durable structure designed for long-term use
• Helps improve aquarium stability and water quality
• Compatible with most aquarium filtration systems

Available Sizes

Why Choose OxyCore?

Effective biological filtration is essential for maintaining a healthy aquarium. OxyCore provides the ideal habitat for aerobic nitrifying bacteria, which play a vital role in the nitrogen cycle by converting toxic ammonia and nitrite into less harmful substances.

Its highly porous structure maximises bacterial colonisation, helping aquariums establish and maintain efficient biological filtration. This makes OxyCore an excellent choice for new aquarium setups, established systems and heavily stocked aquariums where water quality is critical.

Directions for Use

1. Place OxyCore in a canister filter chamber, filter basket or filter media bag.

2. Position where water flow is consistent to maximise bacterial colonisation.

3. Use approximately 50g (¼ cup) per 200 litres of marine water or 400 litres of freshwater.

4. Periodically clean using aquarium water or a suitable maintenance product to remove excess debris.

For Best Results

• Maintain media cleanliness with Blue Shark Outbreak! Waste Control.

• Combine with Blue Shark Colony Rapid Cycle beneficial bacteria to accelerate biological filtration and aquarium cycling.

• Use as part of a complete filtration system for optimal water quality.

OxyCore delivers the surface area and durability needed for effective biological filtration, helping beneficial bacteria flourish while supporting a cleaner, healthier aquarium. Whether you're establishing a new tank or upgrading your filtration system, OxyCore provides a dependable foundation for long-term aquarium success.

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Klarna's credit products are provided by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority. More information can be found here.

Newpay finance options are provided through Deko’s platform by NewDay. P.D. Aquatics Ltd, t/a Aquacadabra is an Introducer Appointed Representative of Pay4Later Ltd, t/a Deko, which is authorised and regulated by the Financial Conduct Authority (ref no 728646) and is a credit broker, not a lender. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (ref no 690292) and is authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 for the provision of payment services (ref no 555318). More information can be found by clicking the newpay option above, or in the Newpay FAQs.

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.