Brightwell Extrax Phos – Advanced Phosphate Adsorption Media

Brightwell Extrax Phos is a high-performance phosphate and silicate adsorption medium designed for all freshwater, saltwater, and reef aquariums. Its highly porous spherical shape maximizes the reactive surface area to quickly trap and remove phosphates, contributing to water clarity and reducing nutrient-related nuisances.

Extrax Phos is a key tool in a responsible nutrient control program, used both in spot treatment and continuous filtration to maintain a low or undetectable phosphate concentration.

📦 Available formats

300 g – ideal for small aquariums or targeted trials
600 g – standard size for medium-sized aquariums
3.2 kg – for large systems or frequent use

🧠 Key Benefits

Effectively adsorbs phosphate and silicate for improved water quality
The spherical surface maximizes contact with the water for better results.
Does not alter the water : does not release phosphate or silicate into the aquarium
Suitable for freshwater aquariums and marine tanks , including reef tanks.
Can be used continuously or as needed in a nutrient control program

📋 Recommended instructions

Before first use:

Rinse each quantity of media (e.g., each 600g) in purified fresh water before use to remove fine particles.

Suggested dosage:

Use approximately 2g of Extrax Phos per 3.8L of aquarium water and monitor the phosphate concentration during use.

Replacement :

Replace the medium when the phosphate concentration stops decreasing or starts to increase, indicating depletion of adsorption capacity.

Note: The appearance of the media may change slightly without meaning that it is sold out.

📘 Advanced usage tips

Place Extrax Phos in a 150 µm filter bag or in a high-flow external filter to optimize contact with water.
A mechanical pre-filter helps reduce biofouling and extends the effectiveness of the media.
Combine with an efficient protein skimmer , regular water changes, and sensible maintenance practices for lasting results.