I looked at Metallica's tank a half hour ago and he wasn't moving and I looked at his body and there is white fuz around his tail, body and head. I quickly put him into a small bowl and put salt into it and gave him some JFC. He's not looking good at all. He's sideways and will float upside down sometimes. Is there anything else I can do? I turned the lights off where he is so he's in darkness. I think he's in pain.