This is not another plastic media - it's hybrid technology!

This inexpensive bio-media creates millions of dimples to secure and develop "good" bacteria. Made of polypropylene and calcium carbonate ribbon.

Easy-to-use, just unwind and let sprawl into your filter. Resists channeling, clogging, and compaction, and fills 2-3 cu. ft. of filter volume.

One package fills two media bags for all waterfall filters.