Plz help : black clownfish w/ a whitish spot (not ich)

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Mine had these white bumps or growths or something on them after a couple days of picking them up. Its kinda tough to see but its the round white dot on its side.

They are in QT in this picture cause I was worried it was ich but it turns out it was something completely different. I would have to lookup what it was called and get back here but basically the only thing that made it go away was lots of water changes. I was told it wasn't life threatening and that it would go away after a while, which it did.