Hello pets unique food is actually tubifex worms processed by the 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 thier 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 varities of tropical fish, gold fish, marine fsh and turtle. Keep sealed when not in use. Ingedients: freeze dried tubifex worms