[Bubble nest] I think so maybe.. the bubbles appear to be the same as the other ones my other bettas have near their bubble nests. He is the only one who hasn't actually made a declarable bubble nest, I just assume it's the bowl.
And yes people have told me what they think. The water changes is the only thing that I should change. I don't feed them the blood worms very often, and I do this because the amount I have compared to the pellets is small. Now I have another reason not to feed them blood worms as often as the pellets. The fish lady at the pet store fed the the worms majority of the time. She said they were rich.
I'm just a little stressed, I apologize if I come off irritated or rude..or any sort of offensive. All I want is to know what's wrong with my fish and how I can fix it. All I know right now is that he could be constipated, but no one is sure, it could be the water that's the problem, but I can't determine that until I keep up the water changes.