Hikari's Mini Algae Wafers are a scientific diet for Plecostomus and other algae eating fishes, including marine herbivores. They provide a balance of premium-select ingredients developed to promote proper growth and desirable form in most herbivorous species. They contain higher levels of vegetable matter and multiple algaes that plecostomus and other algae eaters prefer. The uniquely shaped discs sink rapidly and retain their shape, allowing less aggressive species ready access to their nutrition. With pure-cultured spirulina and chlorella algae to help your underwater friends look their best!