Excellent Supplemental Diet For Larger Marine Fishes, Inverts & Any Other Fishes Requiring High Protein Or Fatty Acid Levels Hikari's 3 Step Sterilization process assures unequalled product quality. Free of parasites, harmful bacteria and foul odor, Bio-Pure frozen diets 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. Want the best for your fish? Feed them Hikari!