Originally Posted by revhtree
Can they get spots or blemishes on their fins from other sources besides ich?
Most definately. Fish can get something akin to bruising which looks like a faded spot on the fins. Usually with good water quality and proper feedings they clear up in a few days. It could also be lympho, fungus or a completely different parasite.
Best suggestion is observe and watch for any changes good or bad. You won't be able to affectively treat anything unless you are sure of what it is first.