Hello Rezis and Welcome

to Fish Lore.
It's kind of hard to tell for certain if it's ICH but my opinion is that it appears to be too big for ICH at this point. I'd be leaning more towards a type of fungus. Is it a white fluffy patch? Are you certain it isn't just new fin growth that is more white?
If it is ICH, the fish will look like it's been sprinkled with salt.
Keep your eye on it and see if it progresses.
Ich diagnosis reference photo
the above is a link to a neon fish belonging to one of our members that shows several spots of ICH.
This is a link that show some GRAPHIC photos of fish disease that may help you to diagnose the issues.
http://www.jbl.de/onlinehospitaluk/p...=2&GalleryId=2 the first few shots are of ICH
Best of luck and keep us posted.
Ken