The high-quality draw-string nylon media bag supplied with IceCap Media Cups is now available on its own and is a simple option for holding a variety of loose media, including biological media, GFO, granular activated carbon, and other similar media. Just fill your desired media in the bag, pull the drawstring closed, and you are done. Place bag in media cup, canister filter, media tray, or within a high flow area of the sump. When it's time to refresh, simply dispose of old media and rinse the reusable bags clean. Available in two sizes.