Betta having trouble swimming.
I've had my betta for a few years. He has a 10g tank to himself, and all the water parameters are ideal, but for over a week now he seems to be having trouble swimming.
He spends most of his time resting on the bottom, at a bit of an angle and a little curled up. And when he does swim, that angle and curl persists, he seems more twitchy in his movements than before, and not quite able to always get to where he wants to go.
This has made it hard for him to eat - but when he does get near food he does eat it.
I tried fasting him for a couple of days, but that did nothing. I've since fed him peas a couple of times, which also didn't help (though today he had more peas than before, so fingers crossed).
Is there anything else I can try, or is human euthanasia the way to go here? :/