when I first got my porc puffer, he didn't move or eat for 3 weeks. Then one day he decided he would eat, and he's been great since that. i think they are just really skiddish, and freaked out when they move to a new place. definetely turn off the lights for awhile, or at night time, try feeding him some frozed people shrimp. that's all mine will eat. oh and my puff will only eat at night. they are the wierdest fish, they are very stubborn, but soon you will see his personality coming out. give itsome time.