I have a juvenile peacock bass that I have had for a few weeks now and it keeps getting white spots that I would imagine are Ick. Looks just like it but they go away after a day or two and reappear after a couple days again. I actually have two of these fish and it only happens to the smaller of the two. There are also a few other fish in the tank and there are no symptoms on any of the other fish either. The water temp has been at a steady 88 degrees with plenty of aeration. The ammonia and nitrites are at 0 but the nitrates are pretty high. If this is recurring ick why are the other fish not getting it?