So over the past 3 days my Arowana has been acting weird. He hasn't ate in 4 days which isn't usually much of a concern but he has been swimming vertically up against the glass lids and what seems like trying to push it, resulting in the Arowana's faced all messed up. Today I noticed his fins starting to bleed and red blotches over his body and upon further inspection I noticed his eyes have sunken in compared to my other Arowana in the other tank. Saturday I did my water changes as usually and salt was added to the tank but whatever is wrong with him seems to be getting worse. Any idea on what I can treat him him? It's probably too late and will most likely lose my most prized fish 