I've had him about 6 weeks. Tons of personality, eats a ton, and has already grown about an inch since I got him (he's now about 2 1/2 inches, excluding horns. Oddly, he only eats formula 2 flakes and seaweed, but he goes crazy for them. Up until tuesday, he was the only fish in a 75 gallon FOWLR. Now he is partnered up with a magnificent foxface. They ignore each other, except sometimes the cowfish investigates the foxface closely to make sure he is not a sheet of algae.