FishAsPets Hallofeed fish food is actually Tubifex Worms processed by the new freeze dry technique-removal of moisture under vacuum at sub-zero temperatures. This process preserve the excellent nutritional factors of live Tubifex Worms and also preserves their flavor-just like real live worms without all the fuss and bother. Feeding Instruction: Tubifex Worms are fed by Pressing the cube firmly against the said of your aquarium wall below the water line. The fish will soon discover the food 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