Hi there, I have a betta, had it about 9 months. It is in a 10 gal tank, by itself. For a week now he has been sitting on the bottom of the tank hasn't been eating. If you tap the tank he will swim but just to the other side and goes back to the bottom. Last night he went behind the heater and rested himself on the suction cup so I took that opportunity to feed him. But it was like he can swim, get to the top... he got a couple pieces but that was like it wore him out and he immediatly went down to the bottom to "rest". I cleaned the tank last night... he does not have a bloated belly or obvious marks on his body. Anybody have any ideas? Before this week he was active and normal.......