Hikari Algae Wafers : Nutrition specifically formulated for the hard-to-feed Plecostomus, but excellent for all algae eaters. Hikari Algae Wafers contain high levels of vegetable matter that algae eaters prefer and love. Vegetable and protein content is balanced to ensure nutrition for proper health and growth. Unique, disc-shaped wafers sink rapidly while retaining its shape. This allows less aggressive species to feed at their leisure without the wafer dissolving or clouding aquarium water. Vegetable-rich Algae Wafers are also great for saltwater fish and other marine herbivores.