Actually reef runner your incorrect. Fish do not grow to their tank size. The reason people think this is because the bigger/messier fish you have in a small tank, the more organics and nasty stuff are present in that water. And having pollutants in the water is what stunts the growth, not the size of the enclosure. And a lot of people feed just as much as they would eat in the wild, and in captivity many specimens get larger than they would in the wild. To the op, that angel is awesome. Definitely keep us updated!!!!!! Can you post a pic of your tank? 425 gallons not liters right? What else do you have with him? And watch out he will probably eat some coral.