Is My Betta Ok? Please Help!!!

I recently had a 2.5 gallon tank with a betta divider and one male on each side. I believe the tail fins of one may have slipped into the other side and got nibbled on. So I put that on in a cheesy betta bowl to separate the two fish and reduce the stress. While in the bowl it seems that the skin by his face and over his gills are almost see through (I believe it was darker before) and I can see a vertical red line. His eyes also seem somewhat blood shot. He is now in his own 10 gallon tank and seems happy as can be. He eats and is very responsive swimming everywhere. Am I overreacting? Please any feedback is much appreciated.

Oh yeah, pH is 7
Nitrate and Ammonia are normal too..

This is also posted in the General Freshwater Forum for a better chance of being viewed. I got the response there that it could be stress and add some aquarium salt.

Wow! I feel bad for those fish! Mine doesn't look that bad! The closest I one is the one attached here. But the only thing that looks similar is how the eyes are kinda red. And there is a vertical red line on the side if each gill. Some one mentioned Dropsy, but he is super active, and his scales are not sticking out like in that picture. Maybe it is stress. He did just go through a move. I bought him just over a week ago and then the fin thing happened... I have him on BettaFix right now and his tailfin is healing nicely...

Nope, not bloated. Swimming around everywhere in his new 10 gallon. That was the only thing I'm worried about. I guess I'll just keep an eye out. Thanks