Today is the day before a week of vacation from school and I noticed my science teacher’s betta has been lying on his side. The science teacher said that he also hasn’t been eating very much, and let me take him home with me so I could watch him over the break. I’m setting up a 3 gal hospital tank, with an air pump, heater, and daily water changes. When he lays, he shifts every so often. His fins look alright, and his breathing isn’t too labored. I have pictures of him in the classroom tank attached. He moves, but he still swims sideways. Is there any advice for treatment? I have API general cure on hand, and I may try a weak dose in case the swim bladder issue is bacteria related, but the primary method I think I’m going to use is frequent water changes. it seems he also may have minor fin rot, but that isn't the primary concern at the moment.