What's wrong with my Silver Dollar

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Ed204

Exodon
MFK Member
Mar 5, 2017
53
29
21
Hello Everyone,
I'm not too sure if this has always been on my Silver Dollar but compared to the 4 others, he's the only one who has it.

It's only on his nostril area and no where on his body. My best guess is a nostril infection?
Is the contagious?
Can I treat this with Seachem Paraguard and Methylene blue dips?

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