Hikari Tropical Algae Wafers are the first and finest diet for plecostomus and other algae eating fishes offering complete and balanced nutrition. Formulated from high levels of the vegetable matter that plecostomus and other algae eaters prefer. Rich in necessary nutrients and complete and balanced nutrition including stabilized vitamin C which promotes resistance to stress and immunity to infectious disease. Through advanced manufacturing technology, we've developed a unique disc that will not dissolve readily which allows your pleco to eat slowly at their leisure. Best of all the disc will not cloud your aquarium water.