hi everyone, I have 3 diamond tetras in my 54g tank. If you know what they look like, they are kinda clear , with pretty silver sparkles all over . One I recently noticed has a what looks like a dirty face, it is brown --wish I could figure out how to post a pic here on my new windows 8, have been trying but no luck--- so from my description, anyone have clue ? I plan to move him to the hospital tank, and hope it didn't spread ....I checked all the pics of diseases and nothing looks like this . Please help ... thanks , Georgie