Seachem Matrix Carbon – Ultra-Pure Activated Carbon for Aquarium Filtration (1L)

Seachem Matrix Carbon is a uniquely spherical, bituminous coal-based activated carbon that offers superior filtration performance. Its macroporous structure is optimized for removing large organic molecules such as nitrogenous waste, making it ideal for both freshwater and marine aquariums.

Unlike traditional granular carbons, Matrix Carbon will not compact, ensuring consistent water flow and full utilization of its absorptive surface. It has an extremely low ash content, meaning it won’t raise pH—even in distilled water. It also boasts the lowest leachable phosphate content of any major carbon brand, making it safe for sensitive reef systems.

Key Features:

• High-efficiency spherical carbon – maximizes water contact
• Macroporous structure – ideal for removing organic pollutants
• Low ash content – minimal impact on pH
• Lowest phosphate leaching in its class
• Safe for freshwater, marine, and reef aquariums
• Will not leach harmful substances or compact in filters

Product Specifications:

• Brand: Seachem
• Volume: 1 Liter
• Form: Spherical activated carbon
• Country of Origin: United States

Directions for Use:

• Use 250 mL per 400 L (100 US gallons) of aquarium water
• Place in a filter bag and rinse before use
• Position in a high-flow area of the filter for best results
• Replace every 4–6 weeks or when water clarity declines

Pro Tips:

• Do not use with phosphate-removing resins in the same filter chamber
• Ideal for use after medication or to polish water clarity
• Monitor water parameters regularly when using chemical filtration