Definitely not ich imo, the node size on the fins are too large. I wouldn't worry it looks like the fish is either healing from something, a lot of times when healing the area gets inflamed like that or has a slight bacterial infection. Chuck full o phail is right on the money though if it turns out being ich the best treatment is heat, they can't reproduce above 86 and they die at anything above 88. Ich is very easily treated in freshwater systems
