Hello, I am new to this forum. I have a Male betta fish named Ruffles. Yesterday I've noticed his tail and find look jagged and I was completely horrified. I looked online and I think he has run rot. I cleaned his tank and changed the water. He swims around his tank and hides behind his decor just like he always does, and he eats his food like normal too. But I'm worried about if this fin rot will get worse. I can't really tell how bad it is either. Can someone give me some tips?