Frozen Fish Food Jumbo Blood Worms For BIG Fish. Hikari's 3 Step Sterilization process assures unequaled product quality. Free of parasites, harmful bacteria and foul odor, Bio-Pure frozen foods are another example of Hikari's product quality commitment. Packed in pure water and available in our no touch cube packs, Bio-Pure frozen foods provide maximum nutrition with minimum mess. Key Benefits: 3 Step Sterilized. Free of harmful bacteria. Free of harmful parasites. Free of foul odors. Bio-Encapsulated With Multi-Vitamins. Vitamins in the animal not the water. Similar to gut loading. Guarantees your pet gets the vitamins. Provides maximum nutrition for your fish. Processed Through Our Mega-Power Freezer. Retains natural color. Retains natural shape. Retains nutritional benefits.