Planted Tank Enthusiast
Join Date: Jan 2013
Location: Baton Rouge, LA
Oh! Trade ya bettas for bichirs! (j/k-have no space)
I agree with peachii.
And you can keep a lot more than 9 females in that size tank, for sure.
But, I can't find the thread now, but someone just recently posted pics of 3 adult male bettas living peacefully in a tank that I believe was smaller than yours?
Anything is possible, there are always exceptions, and sometimes things may go right first go around, then go terribly wrong the next with fish personality. All it takes is one bad seed.
The nastiest, baddest fish I ever encountered was a small metallic green male platy. Attacked everything in site, from plants to assorted fish, from acclimation to his brief stay of a day in that tank. (heavily planted 46 gallon, with guppies, gouramis, swords, and other platy who didn't know what to make of "Slasher, the Hit-n-Run Road Rage Fish")