Hikari Frozen UVX Blood Cubes, a 3.5 oz package of frozen, high-quality bloodworms that have been treated to be free of parasites and harmful bacteria. This specialized frozen food is designed for most aquatic pets, offering a diet of brine shrimp with spirulina, which is part of Hikari's commitment to product quality and safety. A 3-step UV-sterilizion process makes it a safe to use and feed product. Feed no more than your fish will consume within 30-45 secons no more than twice daily. Avoid overfeeding as it can cause water quality issues. NOTE: Handling frozen food that is derived from a live animal can cause the same allergic reaction possible by handling the live animal itself. To avoid potential problems, always thoroughly wash your hands immediately after use and before any contact with your nose, eyes or mouth. Always avoid any contact with open wounds.