No, I don't think so. I had my hand in the water just now and didn't feel anything. I've also noticed that he has a few areas on him that don't look right. You know how when you touch a butterfly or a moth that kind of has that powder coating on it and it smudges? Well, weird as it might sound, that's what my tang looks like in a few spots. Also, I was gone most of the afternoon and evening. When I left he seemed fine, but when I came back I noticed a few of those spots and it also seemed like he was having trouble seeing. He was in a corner of my tank that he's in all the time and he couldn't seem to figure out how to get out of there. I also noticed him bumping into the glass a little, he's never done that before. He also seems like he's not as bright colored as before. He has always been kind of a white/silver with beautiful dark stripes, and I know sometimes he would change color a little when he was scared, but his stripes aren't nearly as dark anymore. Any idea what's wrong? :?