Thanks for your inputs,
It isn't like a white fuzzy ball or anything, it's 100% clear like a layer of it's skin peeled up or just like a blister. very small, top lip. It seems to be going away (although still noticable) I would take a pic but my camera is on the blink and I don't know if cell phone pics would be clear enough. One thing I did do, I was feeding some frozen food and a good sized chunk (half the size of your small finger nail) fell into the tank. I think this is the one that grabbed it and took off. Now I'm wondering if maybe the cold maybe blistered its lip? Just trying to figure out all angles.
Thanks
Carl