Seachem PhosGuard is engineered to effectively eliminate phosphate and silicate from both marine and freshwater aquariums. Designed specifically for scenarios not requiring phosphate buffered freshwater, it provides superior water quality management by leveraging its high porosity and bead-shaped structure to optimise water flow and nutrient removal efficiency. PhosGuard stands out due to its exclusive spherical form, which prevents compaction seen in granular alternatives, ensuring maximum contact with aquarium water and enhanced performance. Numerous studies have debunked myths around aluminium oxide-based removers, confirming that under reef conditions, PhosGuard does not release harmful aluminium, supporting a safe environment for corals.

Our controlled tests indicate negligible aluminium release even at elevated dosages and low pH, reinforcing PhosGuard's safety for aquatic ecosystems. Moreover, it is an ideal choice for marine aquarists who prioritise water clarity without compromising coral health, due to aluminium oxide’s limited absorption into cells, ensuring non-toxic interaction with delicate coral species.

To use, PhosGuard should be strategically positioned in high water flow areas such as canister filters or box filters to optimise contact time with water. Regular monitoring and replacement based on phosphate or silicate concentration levels ensures sustained water quality management, making PhosGuard a reliable partner for maintaining clear and balanced aquatic environments.

• Spherical shape for optimal water flow and maximum phosphate removal.
• Tested safety with minimal aluminium release under standard reef conditions.
• Non-compacting design prevents flow restrictions.
• Compatible with various filter types for adaptable use.

Seachem PhosGuard provides unparalleled phosphate and silicate management, ensuring vibrant and thriving aquariums. Its innovative design and proven safety make it a trusted choice for aquarists looking to maintain pristine water conditions while protecting sensitive marine life from unnecessary exposure to soluble aluminium.

• Volume: 100ml
• Recommended use: 250 mL for every 300 L (75 gallons)
• Material: Aluminium Oxide
• Suitable for: Marine and freshwater (non-phosphate buffered) aquariums

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.