I've had my betta in a huge glass bowl for the past year. I never had a problem with him. Recently however, he showed signs of being sick. Sluggish, loss of color, etc. So, I started looking for info on the net and decided to take him to PetCo and have the fish lady look at him. She said it looked like dropsy.
Within the past 2 weeks, I got him transferred to a 2.5gal tank and have him on Maracyn-Two (spread-spectrum antibiotic) for the dropsy. He's still not very colorful, doesn't swim much, usually lays on one side or the other, and does not eat.
Is it just age? Should I be prepared to replace him? Anyone have any ideas? And please, if you're responding, know what you're talking about.