Join Date: Jul 2012
Location: Third Planet From The Sun
From what I've read, bettas as we know them to be, are extremly aggressive and territorial. You may get away wih it for a while, maybe get lucky and have a few hours, but I personally wouldn't risk it. Unless you can keep a constant vigil (24x7), which I doubt you'd be able to do (especially when sleep calls), I'd just go the divider route so you wouldn't have to worry about this thing happening. Just my two cents fwiw.
"I want to share something with you: The three little sentences that will get you through life. Number 1: ‘Cover for me.’ Number 2: ‘Oh, good idea, Boss!’ Number 3: ‘It was like that when I got here.’” (Homer Simpson)