Thats the way a Hippo tank should act..cool!!I question if my Blue Tang was ever right, his color is completely different now, a brilliant bright blue and swimming and eating likes theirs no tomorrow.
Cool beans, as long as he is stable enough. Just make sure the copper is at the same level in this tank before adding him and all water parameters match the system he came out of.I'm about to transfer him to a 30 gallon by himself and let him ride out his qt time in a bigger tank.