The picture I just posted is the best look that I've gotten. It looks bad. At this point, I'll focus on quality of life and euthanize when appropriate.
My betta has developed a lump on his side. Sorry that I don't have a picture. He's not cooperating. I'll post one when I can.
I just saw it today when I was feeding him. He still eats well. But he hides more than he used to and sometimes rests in an unusual position. On his side, facing...
Some snails and seed shrimps hitchhiked in. Fine with me. They can take care of detritus and dead leaves. It's not like I'm feeding anything in the tank so they shouldn't get out of control.
OTOH, I messed up here. I neglected the cycling of this tank and the cycle. Basically had to restart it. Now it's been sitting at 2ppm ammonia and 0 nitrate for a while.