Keep your corals healthy and feed them consistently with this Long Acrylic Coral Feeder Tube! It is convenient to use and reusable too! You can use this long tube to administer fertilizers to your corals and other plants in your fish tank. It has a suction ball at the tip of the tube for sucking in the substance and then releasing it into the corals. It is transparent so you can easily see how much you are feeding it.