Fungus on my royal gramma

[Maridia]

It looks like my royal gramma might have fungus growing on his skin. How do i properly treat this? Is it also contagious? Do i need to quarantine? Or can I treat him in my main display with rest of my fish? Any info would be great. Thanks

 

[tangs27]

I would quarantine just to be safe. That way you wont have to treat the whole tank. There is a fungus medication that will help cure it, I can't remember the name but I've seen it at most fish stores.