I just got my betta yesterday, and he's already sick. He's lethargic, and swimming sideways when he swims at all. His gills are sticking out, and there's filmy white stuff all around his head. I can't get a good picture because he's hiding in the corner.
He was completely fine when I got him last night. The water, which I left sitting out for 24 hours because I didn't have conditioning drops (I'm getting some tonight), was freezing for a while, even though the room is 80 degrees. I've been keeping the bowl under a lamp all day, and it's finally warmed up. He hasn't eaten anything yet.
Last week I had another betta die with the same symptoms, the night after I changed his water for the first time. I thought at first that it was ich, but he was dead less than two days after I noticed the film, and I've had fish live for over a week with untreated ich before. I cleaned out the bowl really carefully before getting the new guy, so that shouldn't be a problem. I thought in might help to change the water, but I read somewhere that it's traumatic, especially if they're already sick, and my last fish did seem fine until I changed it.
I'm really not looking forward to losing two fish in two weeks. All my other bettas have lived for years. Does anyone know what I can do?