Fish looking like there gettin skin blotches?

[TonyOrlando]

Im not sure how to really describe it, but over the last few weeks ive noticed my fish kind of are loosing parts of their fins and color on their noses and cheeks are looking like its peeling. There is no signs of ich. Yesterday I added some stress coat formula to the tank. These fish have been in my tank for 5 months and I havnt done anything out of the ordinary to my tank. Please give me some advice, because I dont want it getting any worst. I have 2 gobies, 1 naso tang, 1 damsel, 1 salon fairy wrasse.

[szwab]

have any picks? sonds like a bacterial infection possibly. I'd also check in the fish disease treatment forum
http://www.reefcentral.com/forums/forumdisplay.php?s=&forumid=87

[TonyOrlando]

no, i dont have any pics. its not ich, and no white fuzzy stuff though, just looks like they a loosing a bit of their fins and have the color looks like its fading on their snouts. It almost looks like their loosing their slime coat.