OK first of all, I'm an idiot. I had my juruparis in a growout and it had gravel. 
Anyway, I noticed one's lower jaw was sort of "pooched" down like he had something stuck in there, and it stayed that way. I was thinking maybe a piece of gravel, so I netted him out and took a look, and no gravel. But anyway I decided to move them all into the permanent tank (with sand). And he's still got the jaw thing going on, but he's eating now and looks a bit better (he'd gotten kind of thin) but he doesn't sand sift like the others do. His jaw does look a bit better though. Any idea what this is, and if it will heal? Was it maybe an irritation from maybe getting a piece of gravel in there?
Anyway, I noticed one's lower jaw was sort of "pooched" down like he had something stuck in there, and it stayed that way. I was thinking maybe a piece of gravel, so I netted him out and took a look, and no gravel. But anyway I decided to move them all into the permanent tank (with sand). And he's still got the jaw thing going on, but he's eating now and looks a bit better (he'd gotten kind of thin) but he doesn't sand sift like the others do. His jaw does look a bit better though. Any idea what this is, and if it will heal? Was it maybe an irritation from maybe getting a piece of gravel in there?