I currently have one in my 100 gallon tank waiting for its new home arriving next week which is a 220 gallon corner tank. Looking forward to that!
Mine currently eats mostly everything I put in the tank and is also very fat. I ordered some frozen angel fish formula food which contains real sponge which is the MI's main diet in the wild. He gobbles that up too. Took him a while to sniff it out though!
Current tank 260g FOWLR.
Fish: Moorish Idol, Powder Blue Tang, Hippo Tang, J Emperor Angel, 3 Chromis, 2 Black & White Clowns, Yellow Tang,