Hello, I have a betta with huge fins. They didn't begin that way, as I got him about 6 months ago, but they have since grown so big that he has trouble swimming. A while ago I read that bettas bred for large fins often suffer from collapsed fins later in life, but no resource I've found can tell me the symptoms. Initially, I thought he may have swim bladder because he inadvertently flips onto his side while swimming and often can't propel himself to go into a full circle. But then I noticed his dorsal laying almost completely sideways and dragging him down, if that makes any sense, and now I'm not convinced it isn't SB. He has no lethargy, still eats like a champ and does like to swim and interact with me. It's just his fins preventing him from doing certain things. I had him in a 10 gallon tank but he was really struggling with so much space so I opted for a 5 gallon instead. Now he's doing better in there, paired with a baffled filter which I am changing to a sponge filter in the next week. My question is really for anyone who has had bettas with super-sized fins: How would I know if Kraken's fin collapsed, would that shorten his life-span, and what can I do to make sure that he has his happiest life? It's also worth noting that his dorsal fins aren't always sideways. Only when he tries to maneuver in a circle or swim to the surface do they kind of..."splay." Kraken is in a 5 gallon tank with live plants, heated and filtered with lots of resting places. But is there anything else I can do for him? Thank you in advance.