Wow, never heard of whirling disease. I hope that's not what it is :sad:
I just moved him to my hospital tank, just in case. If it is a parasite, would it effect him that fast? He just started swimming on his side yesterday. And this morning was the same. Then when I went to feed them after work today, is when I noticed him spinning like that. So it happened sometime between when I left for work this morning and when I got home (normal 8 hour/day job).