I recently bought some fish - eight black phantom tetras, three cory cats and one veiled angel. I have them all in a bucket I am using to get them use to the tank's water. The cories and tetras aren't bothering the angel in the slightest, but he's leaning heavily to one side. His fins look fine and at the store he seemed healthy. I've never had an angel before, so I don't know if this is normal for them. Is he okay?