The 10/20 Extra-Coarse Filter Glass is designed for use in swimming pool sand filters. As a high-performance alternative to traditional silica sand, it improves water clarity while supporting higher flow rates and lower pressure loss. The extra-coarse 10/20 grade helps reduce channeling and is ideal for applications requiring strong flow distribution or layered filter beds. Durable and non-porous, this glass media offers longer service life and reduced maintenance compared to standard sand.