When I first got him I had him in a 1/2 gallon and he wouldn't eat at first. At best he would grab the pellets and it would fall out of his mouth or he would spit it out. But then eventually he came around and loved Hikari pellets. I moved him to a 5.5g right now and he seems to like it. But now he grabs at the pellets and they seem to just float back out of his mouth. After that he just looks at them then leaves them alone. One time he even grabbed all three, one at a time then all three floated out right out of his mouth! Should I be worried about this, or is he just somehow adjusting to his new tank again? He does the same thing when I feed him freeze dried blood worms.