Samurai | High-Performance Filter Media — 1 Liter

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“Not only enhancing visual beauty, but improving the very essence of water.” is a professional-grade filter media that has long been trusted by professional aquarists and water quality management specialists. Recognized by water quality professionals, it takes filtration performance to the next level.

Made in Japan and perfected for superior filtration, supports clean water, healthy fish, and a stable aquarium. Ranked No.1 on major Japanese e-commerce sites, it has finally launched in the U.S. Its spiral design houses beneficial bacteria, helping keep tanks clean and balanced.

Nitrification, the heart of filtration, is an aerobic bacterial process that converts ammonia to nitrite and then nitrate. Ordinary porous media turn anaerobic inside, limiting colonization area, but provides over 10x the effective surface area for superior filtration.

Created by a Unique Spiral Design 『Biological Filtration』 The unique spiral pleats and textured surface create an exceptionally high surface area that promotes the colonization of bacteria capable of breaking down contaminants. By enabling aerobic and anaerobic bacteria to coexist through its spiral structure, the media achieves long-term self-stabilization of water quality and delivers filtration performance equivalent to natural filtration processes found in the environment. Naturally attracts floating debris. 『Mechanical Filtration 』 Spiral structure generates appropriate water flow to attract and trap microscopic debris and organic materials (floating waste) for effective filtration and removal. Water-Flow-Design Filter Media 『Perfect Water Circulation』 Identically shaped filter media can guide water into fixed pathways (channeling), creating low‑flow zones where circulation may not reach. In these areas, limited oxygen may reduce aerobic bacterial activity, contributing to imbalance in the filtration layer and unstable water conditions. ’s uniquely shaped spiral flutes generate gentle turbulence that helps circulate water evenly across the media, supporting balanced bacterial distribution and consistent filtration performance. No Impact on Water Even Over Long-Term Use 『Stable Water Quality』 Made from plastic (PVC / lead-free), it contains no water-soluble components, ensuring safe use without altering water quality. Additionally, its commercial-grade high strength resists chipping and cracking, minimizing the risk of filter media-derived impurities circulating inside the aquarium making it ideal for long- term operation. Long Service Life Reduces Operating Costs 『Overwhelming Durability』 offers a service life ranging from 5 years to semi-permanent use, significantly reducing costs associated with periodic replacement. The highly durable material and proprietary structure resist degradation over time, maintaining shape retention and functional performance even after extended use. Ultra-Lightweight and Clog-Resistant 『Easy Maintenance』 Made of vinyl chloride, it is lightweight and easy to handle and remove. Its clog-resistant structure maintains water permeability over long periods, reliably reducing filter maintenance frequency and workload.