Alfagrog E25 Ceramic Biological Filter Media (15kg / 20L) Improve biological filtration performance with Alfagrog E25, a highly porous ceramic filter media designed for ponds, koi systems, aquariums, sumps, and trickle filters. Its lightweight foamed ceramic structure provides an extensive surface area for beneficial bacteria, helping to support the biological breakdown of ammonia and nitrite. Suitable for both freshwater and marine systems, Alfagrog is chemically inert and designed for long-term use in demanding filtration environments. Condition Brand New / Unused: Media has never been used in any filtration system. Repackaged: The original manufacturer packaging was damaged during storage or transit. Full 15kg (approximately 20 litres) has been weighed and transferred into secure replacement packaging. Recommended to rinse before use to remove any dust generated during transport. Key Features Highly porous ceramic structure provides extensive surface area for beneficial bacteria. Supports biological filtration and waste breakdown. Chemically inert and pH neutral. Suitable for freshwater, marine, and koi pond systems. Lightweight yet durable foamed ceramic construction. Ideal for filter bays, sumps, shower filters, and trickle systems. E25 grade media with pieces approximately 10mm–45mm in size. Specifications Product Alfagrog E25 Material Porous Foamed Ceramic Weight 15kg Approximate Volume 20 Litres Grade E25 Piece Size Approximately 10mm–45mm Suitable For Koi Ponds, Aquariums, Sumps, Shower Filters & Trickle Filters ```
