Filter Media Sera Bio* Fibres Coarse 40 g – Biological Aquarium Biofilter Fill

Sera Bio* Fibres Coarse 40 g are coarse biological filter media designed for use in aquarium biofilters. The porous fibre structure provides a large surface area that promotes colonization by nitrifying bacteria, supporting the breakdown of ammonia and nitrite and contributing to a stable aquatic environment. The product is suitable for placement in internal and external filters and complements mechanical and chemical filtration stages.

Advantages

The coarse fibre matrix offers high porosity and durability while maintaining water flow through the media. Its physical form resists compaction, ensuring long-term availability of surface area for beneficial bacteria. By encouraging biofilm development, these fibres help maintain biological filtration efficiency and support water quality with minimal maintenance.

Suitable for

• Freshwater aquariums requiring improved biological filtration
• Saltwater aquariums where biological nitrification is needed
• Internal sponge, canister and hang-on filters as an additional biofill
• External biofilters and sump systems to increase bacterial colonization area

Key specifications

• Net weight: 40 g
• Coarse porous fibre structure for enhanced bacterial colonization
• Physical form: loose fibres suitable for filter baskets or media chambers
• Durability: dimensionally stable, resists compaction under normal flow conditions
• Compatibility: suitable for use with mechanical and chemical filtration stages

How to use

Rinse the fibres briefly with aquarium water before installation to remove loose particles. Place the media in a filter basket, media chamber or a fine mesh bag and position it where water flow is steady but not excessively turbulent. Combine with mechanical pre-filtration to reduce clogging and with chemical media if required for specific water treatments. Replace or clean according to the biological load and flow conditions—inspect periodically for heavy fouling.

Usage recommendations

For optimal biological filtration, maintain regular water flow through the media and avoid complete simultaneous replacement of all biological media to preserve established bacterial colonies. Monitor ammonia and nitrite levels during initial biological colonization and after any maintenance to ensure stable water parameters.