ok, i can't tell if my fish is eating his food. he'll go to the surface & eat the food, but he'll move i around for a couple of seconds, then spit the pellet back out. then he'll do the others the same way & eventually, because he did that, the pellets will sink to the bottom. i've had him for about a week now, but i don't know if he's starving or not. can sumbody help me please?