Yesterday I did a 25% water change to my tank. Today my betta was swimming kind of side ways and at the top. Today when I saw what happened I immidieatly did a 50% change and she was back to normal. Any reason why that happened?
Did you dechlorinate the water the first time? It sounds like he was poisoned by something. Maybe chlorine, maybe the city's water went wonky. Or something could have contaminated the tank water or the new water. Bloating will cause erratic swimming, but so will near death experiences lol!