Three days ago, I caught one of my neons having some sort of seizure. He was darting all over the place and spinning rapidly. A few times he would go head over tail fin, and spin around. When calmed down, he was floating on his side. I assumed that he was not long for this world. The next day, he was alive. Two days later, he was having another "seizure," but he lives on. I noticed some wierd patches near his head. They appeared to be a sort of gray or tan. I always caught him doing it when I came in the room at night and I had just turned the light on. 
