Hi, This is the wrong place for your question. This is Sabi's Blog.
Your question would get the attention it deserves here:
http://www.fishlore.com/fishforum/fr...-fish-disease/
It would be a good idea to quarantine the sick fish.
Are you sure it's a fungus and not fin rot? You can try Rid-Fungus, if you're sure that's what's wrong.
When you're looking for the best place to post your question, here's a good place to start. Just scroll down and find the best place for your thread.
http://www.fishlore.com/fishforum/
Perhaps a mod will see this and move this to it's proper place.