I’m extremely frustrated because I posted an entire thread on another forum and when I went to reply to someone trying to help me, an admin turned off the ability to answer on the thread and said I should attach it to a completely different question I had posted that wasn’t about the fish I’m speaking of now. So I really hope someone here can help me. I’m at a loss My betta was bought about 6 months ago, he looked fantastic and shortly after I got him, he got some sort of internal parasite while I was also putting him through the fish in cycle (didn’t know any better, do now) his parasite caused his fins to be clamped, he never flared and they weren’t flowy or “beautiful” anymore. I knew it was the sickness and stress, I provided every day/every other day water changes especially while fish in cycling and even for an extra month after the tank cycled. His fins failed to get back to how they were. For a while I’ve always assumed it’s nothing to worry about and that his fins just couldn’t grow back after that experience, but I’m now getting really alarmed as I saw a picture of what he looked like before (before & after photos inserted below) and he has major fin loss. I also see that another betta I have has a similar problem, but both 5 gallon tanks, no tank mates, are cycled 0 ammonia, 0 nitrite, 5ppm nitrate, 7.8 pH. Going to order GH and KH kits soon, but I don’t have them right now. I’m so curious and worried as to why my fish looked better going through a fish in cycle than they do now. I provide the very best care I can. And weekly 30% water changes with prime. No heaters are in any of my tanks because my room has one of the only working heat vents and my room stays every bit of high 70’s to low 80’s especially in summer. It’s gotta be fin rot, but how can I treat this easily and will it even help them? I have aquarium salt and I’m scared to use it. And I don’t have a QT tank small enough, only containers.