Believe me, this is not a normal full tummy. I had hoped that by fasting him it would help, but he was larger this morning. He looks like he swallowed a marble!
as far as your questions: I have had him since he was a juvenile about 5 months.
change water: alternate 100% and 50% water change every week
always a good eater -- ate the guppy fry, ghost shrimp, etc. I feed him 2-3 aqueon betta pellets/day (more when he was growing)
I have just tried fasting him, but added 1 tsp epsom salt yesterday and another 1 tsp today.
Heat: heated to a constant 79. Bowl is covered so humid on inside.
His bowl contains live plants --minisword, anubia, wisteria, gravel, and a sunken log. The only change was that I took out his filter about a month ago since it was growing algae and turning the water green!
I have 7 other bettas and they are all doing well. None have had this issue. I will post a photo tonight ----
Thanks so much for your interest!