Frabill"s Fat and Sassy Worm Bedding in the 2.5 pound Pre-Mix pack comes ready to use right out of the package… no food or water needed for 30 days. The bedding material is 100% biodegradable and will not mold or sour. It is also safe for fresh or salt water environments. The bedding duals as a built-in food source and works with Night Crawlers, Blood, Clam, and Sand worms. This 2.5 pound package will support 7.5 dozen night crawlers or 250 small worms.