In the past 3 or 4 days, my Betts has been squeezing himself under rocks and not coming out. He has become very slow and has to wriggle his whole body to move. He had clamped fins about a week ago. He seemed to be doing fine, until now. He IS an older betta. 4 years, probably. He also has a couple white blotches on his head. I hope this is not the end of my boy. 