Today when I came from school, I went to see and feed Lightning and I checked the filter (Mini Bow 2.5 filter) and I saw a fin I think, it was red. When I pick it up to see what it was red liquid came out which I suspect is blood. And he has like a triangle cut on his caudal fin or tail. Also, he has a tear on his caudal (tail) and his anal fin. What should I do? Should I get another filter, if so which one is good for a betta in Mini Bow 2.5? Should I put something in front of it to reduce the flow? WHAT SHOULD I DO?!
Im sorry, Im just really concerned about my fish.