I see a small white spot on my older angel fishes fin. Its only in one spot. Hard to get a pic but it is round and bigger than ick looks like. None of the other fish have it either. Also paramaters are all normal. Temp Normal.
angels, especially older ones in my experience, get those nodes on their fins. as long as the fish is eating, swimming, pooping, and is generally healthy, and the fin isn't damaged or getting worse, then i wouldn't worry one bit.