So, I started out with a sorority of 7 female betta's in a well planted, heated and filtered 10 gallon tank. But recently, two of my females, Idris and Violet, have passed away. The tank was peaceful, and the two girls were old and not sick. But I thought of something. What happens when another fish dies? Hopefully it won't happen for a while, but then I would only have four females. I don't wish to keep buying new females, so what happens when I get down to three, or two females? Should I get dividers for the tank when the sorority becomes to small to function peacefully? Just planning for the future, thanks in advance!