After reading as much as I could, I still have some questions. My Betta, "Doggie", was on his side, lethargic but alive about 3 days ago. I read up, stopped feeding him, have changed 50% of his water each day the past 3 days and have kept a close eye on him.
He's also got what appears to be a very long, white poop just hanging there. it was there when I first noticed his sideways floating (which I figure had to do with his swim bladder and constipation) and has gotten longer. His color isn't as vibrant as it was before but he still swims around some and responds to me...though not as much as when I first got him about 6 weeks ago.
I have him in a 2.5 gal, filtered tank with a heater. He looks like he's got a lump in the back, near his rear fins. I tried getting a photo of that but it just won't show up well. I am going to try to post a pic of his poop just in case I am wrong and it is something else.
Thank you in advance for your help!!