Hikari Algae Wafers were specifically developed for the hard to feed algea eaters and other algae eating bottom feeders. Accept no substitutes, request the first and finest disc shaped diet for your herbivorous fish! Hikari Algae Wafers is A Uniquely Shaped, Nutrient-Packed Formula High levels of vegetable matter that algae eaters prefer and love With stabilized vitamin C to support immune system health Unique raised disc shape helps duplicate plecos natural feeding action Specifically formulated with a perfect texture that doesn’t dissolve readily Great for saltwater fish too Feed no more than the amount your fish will completely consume within two hours. Many bottom feeders are nocturnal (active at night), for best results feed late in the day or at night. Care should be taken to avoid over-feeding and always remove uneaten food after feeding period. Note: Hikari Tropical Algae Wafers contain higher levels of natural ingredients which may cause a slight change in color from one production lot to another. Rest assured because of our rigid quality standards each package meets our superior nutritional specification