Hallofeed unique food is actually Tubifex worms processed by the new freeze dry technique-removal of moisture under vaccum at sub-zero temperatures. This process preserve the excellent nutrional factors of live Blood Worms and also preserves their flavour-just like real live worms without all the fuss and bother. Feeding Instruction: Press the cube firmly against the said of your aquarium well below the water line. The fish will soon discover the cube and eagerly devour it. Excellent for all varieties of Tropical Fish, Gold Fish, Marine Fish and Turtle. Keep sealed when not in use. Ingredients: Freeze dried Tubifex Worms