Last Saturday we purchased a Red Serpae Tetra. Just yesterday I noticed that its lower fin is turning white. It doesn't look like its rotting because the whole fin itself is still present...but it is definitely turning white (opaque).
I've looked over the thread describing the various fish diseases, and I don't know which one it could be. The fish isn't lethargic, it swims around the tank like a normal fish.
I've attached a few actual pics of my fish in hopes that someone can help me determine what's wrong with it. Please forgive the lack of clarity in the pics, I used a very outdated digital camera for these shots.
The area that is white should be blue like the rest of the fin in that particular area.
I hope someone can help me...