I just recently got a new male crowntail betta. I've never gotten a betta this young, because all of the other bettas I've bought were just about fully grown. This is a little guy. He swims around and seems happy but when I feed him, he doesn't seem interested at all. I tried flakes and pellet food, he doesn't want either of it. I've had him for 2 days now.. is this just him getting used to his surroundings or should I be worried? Any suggestions? Thanks!