Who Gives A Fish Forums

I'm wondering if it might be swim bladder disease? I had a similar issue with my betta and overfeeding was the culprit. Is Sebastkento4 looking a bit swollen? You might want to try a de-shelled, blanched pea to see if that helps.

Your betta pics are absolutely gorgeous, I'm seriously missing my betta days, they're such awesome and personable little fish.