Hikari Algae Wafers are high in vegetable matter for Plecostomus and other algae eaters and marine herbivores. The worlds first and favourite wafer food. The uniquely shaped disc sinks rapidly and retains its shape and consistency. Contains a high level of spirulina and chlorella algae. Hikari Algae Wafers contain high levels of natural ingredients which may cause slight differences in colour from one batch to another.