Hmm... Doesn't seem to have any problem... Just his colour..

If it is fin rot, the fins will be falling apart, literally. And the edges will be reddish in colour, sort of like a thin red margin.

White tip? Can't really see.... I'd assume it's just his colour as well.... But if there's lots of white flecks or spots, it could be ick, a parasitic disease. Treat with aquarium salt laced with methylene blue. Instructions should be as stated on the container.