Savio Springflo This is not just another plastic media - it's hybrid technology! You are looking at the world's most advanced bio filter media. The remarkable, embossed green coils of Savio Springflo provide more surface area for beneficial, waste-purifying microorganisms than any other product of similar volume. Patented design resists clogging, channelling, and encourages rapid bacterial growth for healthier, cleaner ponds and water gardens. Savio Springflo's embossed pattern provides over 180 sq. ft. of active surface area per box. Easily self-dispenses - simply hold above filter and start unwinding from center. While other media have a short usable life (they work best off the shelf) - the "loose coil" effect created by Savio Springflo fosters an ideal environment for waste filtering - it actually works best as it gets dirtier. Plus, it's very easy to clean - just don't use soaps, hot water, or chemicals, as they can harm the beneficial bacteria thriving to keep your pond clean, naturally. Savio Springflo is a special formulation of embossed polypropylene and calcium carbonate that lasts for an entire year. Plus, it's an easy upgrade for any old style filter still using filtermat, gravel, bio-balls, or floss.