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A high-performance, fine-pore biofilter media with unbelievably high surface area (82,000 ft2) and the ability to perform both nitrification and denitrification under certain conditions. Siporax® works best with well-filtered, clear water (otherwise heterotrophic bacteria will cover the surface). Conveniently packaged in one-liter mesh bags. Media is 7/16" in size. Made in Germany.
Siporax® is a registered trademark of Sera GmbH LLC.