Hello I am new to this. My Betta was super happy Friday. Swimming around and making a beautiful bubble nest. I come back today and he stays towards the back of the tank and acting very erratic. He ate very well this am but he just seems off. Now he looks like he is trying to lay on the fake plant. Could it have been a tile crew that was in my office over the weekend, or is he sad because we left him and he is so used to seeing us everyday?? I don't know maybe I am just over reacting.