I just bought a poor little sick betta from pet supplies plus. When I saw him in the store he was lying on his side at the bottom of his cup and barely breathing. Brought him home and put him in new water. He still isn’t swimming, and when I scooped him up in a ladle with some food, he wouldn’t touch it. He is terribly skinny and has almost no color to him. He just lies there and breathes. What can I do for him??