White patch on marigold platy

White patch on marigold platy (pics attached)

Hi. I noticed a faint whitish patch on the body of my platy. It's like 3-4 mm large and doesn't look like ick. I'm thinking either it's scale damage from getting caught on driftwood or fighting with other platys or maybe body fungus. I'll try to post a pic when I can. I know it's a vague description but any ideas? Ammonia is 0, nitrite 0, nitrate 10. Temp 77.

 

Is there anyway to upload a picture to get a better idea?

 

Here are the best pics I could get. I'm hoping someone can identify what the white stuff is.

 

Anyone have any ideas? He's eating but his fins look slightly clamped. I plan on moving him to a hospital tank today but am not sure what to treat with. I'm leaning towards an antifungal treatment because that's my best guess, but if any of the more experienced aquarists can offer their expertose, I would really appreciate it. Thanks.

 

Just to update everyone, I quarantined the platy in a 10 gallon tank. I'm planning on adding some aquarium salt, but I'm still hoping someone may have a better idea of what my platy has and how to treat it. After 2 months of doing well, I just lost a platy to ? constipation so I'm really hoping this one pulls through.