The last couple of months have been torture on my poor little Betta.
He was constipated after eating a little bit of Brine Shrimp and caught an Ich infection during recovery. Towards the end of his treatment, his eyes have gotten puffy, his tail torn, and he's become quite lethargic. During the last couple of days, he's been suffering from buoyancy issues and is easily constipated with visible contortions ("S" shape) and for some reason bubbles have been getting stuck on him body. I thought he was getting better recently, but it's gotten bad again, and just today I noticed what appears to be a small white patch on his head and I think he's missing a scale. There's a bright red half-circle on the top of his head which is either a missing scale or a really bright one. Though he's been lethargic, I've seen him dart around a little tonight, often trying to swim low, but struggling and eventually being pulled up. He fortunately still has an appetite, but it's the only thing that remains constant.
I've been doing my best to take care of him since I received him in his one gallon, unfiltered, unheated, tap water-filled tank. I moved him to a 6.5 gallon tank, got a Tom's mini filter, a heater to keep the temp in the low to mid 80's, lots of silk plants and ornaments, Omega and Formula pellets, and I've been doing 15-33% water changes every day. I don't know what I"m doing wrong or what. I just want him to be happy and healthy, but it breaks my heart into a million pieces to wake up and see him in such bad shame, then go to bed when he's feeling even worse.
I don't know much about Bettas sadly, but I wonder if I'm doing more harm than good. I'm out of money, and I don't know what this new red mark means or anything. Should I continue to change his water daily and feed him, or would it be more humane do ease his passing? I just don't know anymore.