I think my CPD had columnaris. Whatever it was it ended up killing him. He was pineconed and his body was like bent and had a stripe down the back. He was also very bloated. He was breathing very hard and was upside down. My question is how do I know if it was columnaris and not just dropsy? What do I do? I have a community tank with a betta, snails, shrimp, Kuhli loach and a few other CPDs. I do not want to treat the tank unless necessary because I worry about the health of my other guys. Everyone is acting okay right now.