My fish was a happy and lively fish last week. I started to notice that he was less active recently and that his fins seemed to be fragile and jagged so I started treating him for fin rot. I have been using bettafix in a smaller tank, and his skin and fins are starting to look better, but he now spends almost 90% of his time laying on the bottom. When he swims around, he swims around super fast around the top of the tank, and then stops and drifts back to the bottom. Sometimes it almost seems like he’s swimming upside down. He’s lost his appetite a bit and hasn’t been eating as much as he normally does. This is a picture of what he looks like now. Any suggestions on how to make him better?