So, I'm not sure if you guys pay much attention to many of my other threads. But my fish have come down with collomanus cotti, a terrible parasitic worm.
The betta that I witnessed fart however long ago I wrote this thread was the first one to exhibit the protruding worms from its anus.
I began to notice the "farts" coming from some of the other fish as well, more recently, as I've become a little more accustomed to the different fish bing infected.
So now that I'm noticing all this, I've come to the conclusion that my bettas never were farting. The bubbles were warning signs. THey were the worms expelling air.
Kind of sad, but interesting by contrast - sort of scientific method, of observation. It gives me inspiration for this hurdle, even if all the fish end up dying, to make something better of it, and chronicle this as an actual article for a couple fish keeping magazines and web sites.