Fungus treatment?

[hatifukui]

Hello, recently i've got an orb ray and today he showed off this fungus on it sting, it looks like a cotton. Is there any solution for this?
Thanks.
I wasn't able to upload tha images here, so i did it to imgur.

https://imgur.com/Ps7YF4h

https://imgur.com/pdbeOR1

https://imgur.com/6MBNJ4S

https://imgur.com/ncnXM4L

 

[kno4te]

Clean water and salt 1 tsp per g. If not better can use nitrofurazone, ray safe.

 

[hatifukui]

Thank you. Wich tipe of salt should i use? Never did a treatment using it.

 

[Tobiassorensen]

I use salt tabs for water treatment. I buy them in 25kg bags. 1 tab per 100L of water. If i use regular table salt i dose 3dl per 100L water