I only have 1 at the moment.
At the most I had 6 at one time.
But unfortunatly a disease spread and all but one (who was in a different tank) died
So yeah... it's VERY difficult to not buy every one that I see whenever we go to Petsmart, VERY hard, but I told myself that I was only going to focus on 1 at a time.
Bettas are definitely "addictive".