Originally Posted by Sakura8
If it was rot, there's a strong possibility it would be affecting all of his fins.
That's kinda what I've been thinking...
But he is very healthy, IMO. I watched him today and he kept whipping his tail around right in his face. So I'm hoping that it is fin biting, as fin rot scares me!
Eventually he will be moved to his own 3 gallon, which will hopefully give him plenty to do. I'll be looking closely for regrowth though.
ETA: NyaNyanNaa, he's in a small quarantine tank right now, so there's not much I can do for entertainment. He's the first one I've had with this high of an energy level, so I will need to find something for him to do.