PhosCore is an advanced phosphate and silicate removal media designed to help aquarists achieve cleaner, healthier water with minimal effort. By combining the proven nutrient-removal capabilities of aluminium oxide and granular ferric oxide (GFO), PhosCore rapidly targets excess phosphate and silicate before they can contribute to nuisance algae growth and declining water quality.

Its highly porous structure provides a large active surface area for maximum adsorption, while the durable media resists breakdown during use, helping to deliver consistent, long-lasting performance. Suitable for both freshwater and marine aquariums, PhosCore is an effective solution for maintaining low nutrient levels and creating a healthier environment for fish, corals and aquatic plants.

Key Features

• Rapidly removes phosphate and silicate from aquarium water
• Advanced blend of aluminium oxide and granular ferric oxide (GFO)
• Helps reduce nuisance algae and improve water clarity
• Highly porous structure maximises adsorption capacity
• Durable media resists physical degradation
• Suitable for freshwater and marine aquariums
• Easy to use in most filtration systems
• Supports long-term aquarium stability and water quality

Available Sizes

• 640g

• 1280g

Ideal For

• Reef aquariums
• Marine fish-only systems
• Freshwater aquariums
• Aquariums experiencing phosphate or silicate issues
• Reducing algae outbreaks and maintaining low nutrient levels

Directions for Use

1. Rinse thoroughly before use.

2. Place in an area with good water flow, avoiding excessive tumbling.

3. Suitable for canister filters, media chambers, box filters and trickle filters.

4. Use a filter media bag where appropriate.

5. Dose approximately 50g per 200 litres of saltwater or 400 litres of freshwater.

6. Test phosphate and silicate levels after four days.

7. Replace when levels rise above 0.02 mg/L.

Whether you're combating persistent algae growth or maintaining a thriving reef aquarium, PhosCore provides fast, effective nutrient control you can rely on. Its dual-action formula and long-lasting performance make it an essential addition to any filtration system focused on achieving outstanding water quality.

Aquacadabra acts as credit broker/intermediary and not as a lender.

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.