A Scientific Diet For Plecostomus And Other Algae-Eating Fishes, Including Marine Herbivores. A Perfect Balance Of Premium-Select Ingredients Developed To Promote Proper Growth And Desirable Form In Most Herbivorous Species. Contains Higher Levels Of Vegetable Proteins Plecostomus And Other Algae Eaters Require. Great For Snails, Crustaceans And Other Vegetable Craving Fish Too. The Uniquely Shaped Disc That Sinks Rapidly While Retaining Its Shape Longer Than The Competition, Allowing Less Aggressive Species Ready Access To Its Nutrition. Contains Two Highly Usable Natural Nutrient Sources, Pure-Cultured Spirulina And Chlorella Algae. Trust The Hikari Logo, Your Assurance Your Aquatic Pets Are Getting The Original And Uniquely Balanced Formulation!