I have a goldfish with some sort if infection. I got him from a friend and said I would try to save him. He is currently in an unheated 20 gallon. If anyone could help that would be great. In the pic you can see his gills are red and white stuff on his tail. He also had some on his gills/face that doesn't show up on the pic. His poop is normal so I don't think its internal. Thank you!