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 matter and multiple algaes that plecostomus and other algae eaters prefer. The uniquely shaped disc sinks rapidly and retains its shape allowing less aggressive species ready access to its nutrition. The perfect treat for your omnivorous fish to super-charge their nutrient intake. Contains pure-cultured spirulina and chlorella algae to help your underwater friends look their best, always.