One of my danios has had a fungus for a while now. Atleast two weeks, because thats when i started treating it, but probably closer to a month-month and a half. It seems to follow a cycle. When i check it periodically throughout the day it gets progressively smaller. Then, before i go to bed its super small. Then, when i wake up the next morning, its big again. Is this not a fungus? Is this normal for a fungus?