Help, somethings wrong with my betta's fins

tessalion

Large Fish
Jun 4, 2006
421
0
0
38
PA
#1
One of my bettas has been acting very "lazy" lately. For a couple of days he just layed in his plant and hardly swam around at all. Today he's swimming around a lot more and seemed to be feeling a lot better. But i just noticed that the ends of his fins and tail are greyish/off colored. What's wrong with him and how do i treat it?