I have a pair of juvenile clown fish for almost 2 months now. I bought them from a LFS where they only sell pre-QT or aquaculture fish. From the first day, I notice the smaller of the two had a red dot on its body by the first white stripe. It has never appeared to cause the fish any discomfort or its swim. It has been eating fine. It actually eats more than the larger clown. Today, as the fish has gotten a bit larger, I noticed red patch may have gotten a bit larger as well but I can't recall if about the same scale as it was before. From the photos, do you think it's something I should treat?