I bought my dream betta tail(a halfmoon) tuesday and he was doing amazing when I first got him. Flaring responsive swimming around built me bubble nests every night. Today I was watching him and he's starting to float on his side..I fed him yesturday morning around 6am and haven't fed him today at all. He's in a divided 3 gal thats heated (not filtered) with a crowntail betta on the other side(Blackbird) temperory while the other tank gets set up (have to disinfect it and fix the seal on it). I just did a 100% water change now because of the high readings(ammonia near .25ppm I believe). Is there anyway to help him? I mean he doesn't seem bloated or anything I'm just wondering if perhaps its swim bladder and if it is can someone tell me how to treat him?...I don't want to lose him.
Here's some pictures also note on the second pic that the orange is from the camera: