Man its a mystery, still no sign of the betta, ive checked the living room from top to bottom and no sign anywhere. I guess I will never know, I checked behind the stand and all the furniture to see if maybe she jumped and hopped around, I know in the wild they can puddle jump and last for some time out of water. Then again, I have almost no open space in top of tank for her to jump out. I have an Emperor 400 that is squeezed into opening for filter, and heater takes up all the room available in its opening.