Emztanjm ... OMG ... My fish has the same silvery patch on him and I've searches all over the site and asked at my LFS and nobody really has any answers. I'm curious as to what you've found out and whether or not your treating your fish with anything. My little guy is perfectly normal, eats great and is very active. He just has this silvery spot, kinda like a loss of pigment in that spot. Have there been any changes in your fish since your last post? I'd love to hear from you.