I would actually say, looking back in the thread, – that if you look at the fish in the photo, – yes, all right this fish has probably ick, but it is not the bigger white spot which determines that. If you look closely at the photo you can also just see that this fish is kind of covered with many many tiny dots.
The bigger white spot is not a symptom of ick really – ick doesnt look like that.
For what I understand your fish has some bigger white spots ???
That could be something entirely else, – not nessesarily bad.
You need to also look on things like – how are they moving their fins’ – if they ick or odinium you will notice that they are sort of moving the fins in a different way as if something is annoying.