Jack's Magic The Filter Fiber Stuff 9oz Bag Jack's Magic The Filter Fiber Stuff 9oz Bag The Filter Fiber Stuff has been developed to be used as a safe, biodegradable, and non-toxic complete replacement for D.E. Combines high performance, outstanding value, and environmentally friendly features into one great product Can be used to enhance the filtering performance of sand and cartridge filters as well The Filter Fiber Stuff is non-toxic, making it safe to handle and store