Something happened to my Winchester. I woke up this morning and when I turned on his tank light there was a small part (about 5mm by 2mm) missing from his tail and it was bright red which i'm sure is blood. He was do for his water change today so now he's in clean water but everything is completely safe in the tank, don't know how he did it. Apart from clean waterm is there anbything else to do? It's still red but I can't get a god picture of the tail...