Powder Blue Tangs are relatively tough to keep for most reef keepers. This one came with my new tank, and was very thin at that time. I feed Nori every day, and he is always second in line to start eating the dried seaweed clipped to the glass. Recently he has begun nipping at my green star polyps and a Toadstool Leather. By increasing the food amount, this has declined somewhat. The Powder Blue is much thicker now, and very healthy. Every night it is excited to get more meaty foods during the evening feeding. People tend to call this fish an 'ich-magnet' because they are so hard to keep. If you decide to keep one of these fish, be considerate in giving it a big tank that is at least 6' long, feed it well and feed it often. Reef-safe.