Designed to work with the Klir Di-4 Drop-In Fleece Filter System.
Replacement 25 yard 50-micron roll of fleece directly from Klir. Rolls can last anywhere from a few weeks to 3+ months and will vary depending on your aquariums bio-load, feeding habits, and a few other variables. The 50-micron fleece can handle up to 750 GPH through the 4" Klir filter system. Using 50-micron fleece will double if not quadruple the filtering performance of traditional filter socks leaving you with crystal clear water in your aquarium!