I agree on the plant thing. My betta has finally gotten over his moping. Tempermental is an understatement when it comes to these fish. Anyway he loves his plastic plant. He will go in between the leaves right below the surface of the water, and go to sleep. Everytime I get up in the morning or come home from work. He will be in the same spot every single time.
He has finally started to eat again, and is starting to make a bubble nest right above his sleeping place lol.