So Luke my blue oranda has a white spot on his head the size of a pea. I moved him to the outside pond and it goes away. I move him back inside and in a few days it is back. The only difference between inside and outside is the temp of the water. He well have to come in for the winter wonder if I should QT him in the 16 gallon planted tank and find a way to treat what ever it is on his head. Looks like a fungus but never gets bigger. Time for some research.