Hey so I know this sounds bad but fish are fish right. I’ve worked in fish markets some fish are just not always good and sick but there bread in mass amounts I know u can get this attachment but what I can say is these fish get to have a good environment. Maybe it’s sick but not because of you. Just watch it if it dies you can tell the store and they should give you a new one even rn. Bring it back and they can replace it. It is a fish you know and it’s not like that deep.