With a striking black body along with red and white accents, the Achilles Tang makes a beautiful addition to any saltwater tank. It is considered a nervous swimmer since it frequently moves back and forth. It is necessary to provide the Achilles Tang with ample space in order to make it thrive. The Achilles Tang prefers turbulent water flow and a large open water column. It is mostly found harassing and attacking other members of the acanthurid family ? especially other Acanthurus tangs. That is why it is best to keep only one Achilles Tang per tank. The Achilles Tang is beneficial in picking off hair algae, and keeps the aquarium free from any algae or green mess. We recommend you to provide some live rocks that encourage the growth of algae on which it can feed in between its meals. It is often noted that tangs are picking at large polyps but still considered safe to keep in reef tanks. The Achilles Tang grows up to 9 inches and needs to be kept in tank of 180 gallon. It is aggressive towards other tangs and surgeonfish, but is peaceful with other fish. Although Tangs will eat meaty foods along with the other fish in the aquarium, it is important that they are offered plenty of marine based seaweed and algae. This will strengthen their immune system, reduce aggression and improve their overall health. Offer dried seaweed tied to a rock or use a veggie clip, and feed at least 3 times per week. Sea Veggies, Seaweed Salad and Ocean Nutrition are all ideal products and are very easy to use. Advanced aquarists only should attempt keeping this fish.