I bought my betta Poseidon about 2 months ago. He was gorgeous. He came in a small tank. Once I think the heater went too high and I changed the water right away to make it about 76 Fahrenheit. He was fine afterwards. But these kind of small tanks are too difficult to handle for temperatures and ammonia. Sometimes the water went down to 72 degres F, and the amonia up to 0.50. I changed water every day. I realized Poseidon became sick, with some white at the end of his fins, then the ends were like twisted and then his fins became clamped, tight to his body. I thought he would feel better in a larger cycled tank. Then, I cycled a 10 gallons tank to put my two bettas (the other one is not sick) with a divider. After being cycled (one month), I put my two bettas in the thank. Unfortunaltely, Poseidon hurt his fin on the top of a betta log (I am so mad to have bought something that is too rough for bettas, though it is supposed to be done for them!). Then my poor betta lost the end of the top fin. He became paler (he is red) and his fins were so tight to his body that I don't know how he still can swim. Also the fins are so clamped that he does not look like a betta anymore! I put him in a quarantine tank. Tried Maracyn 1 and Maracyn 2, then Kanaplex, then Metranodazole but nothing helps. He still looks for food when I come close by but most of the time he lays at the bottom, in a corner. I don't know whether the medicine makes him worse. PLEASE HELP. WILL he ever recover his fins at this stage? Thank you for your advice.