Crystal Bio

Improve biological conversion, water clarity, and overall pond stability with our range of authentic Crystal Bio filter media. Manufactured in Japan and widely used across commercial koi farms, Crystal Bio is an ultra-lightweight glass-ceramic media designed to deliver superior nitrification in shower filters, trickle towers, and biological chamber setups.

Formed by foaming glass at temperatures above 900 degrees Celsius, each piece of Crystal Bio features an intricate, hyper-interconnecting cellular matrix that provides up to ten times more usable surface area than standard plastic media. This interconnected structure creates sheltered zones for beneficial nitrifying bacteria and microscopic organisms to thrive, accelerating the breakdown of ammonia and nitrite while actively digesting fine organic waste. Due to its low weight, Crystal Bio reduces structural strain on multi-tier shower units and can also be submerged using weighted media nets for multi-bay applications. Explore our complete Crystal Bio collection to supply your pond with dependable, high-surface-area Japanese bio-media engineered for crystal-clear water and exceptional aquatic health.