I have a tetra in my 29 gal tank that I suspect might have something wrong with it. Unfortunately I don't know what kind of tetra it is, but he's about 1 inch, has a white/silver body, a red tail, and yellow and white markings on the fins. For a couple of weeks now the base of his tail has been looking kind of cloudy, but after researching it online it doesn't appear to be fungus. Just today I noticed that he has a pin-sized hole right in the middle of his tail fin. He is still swimming and eating normally. Can anyone help diagnose my fish? TIA!