I also lost 1 today. She was a new one (not sure if you saw- I'm quarantining bettas for a sorority) ... But I went to petsmart, they had one female left IDENTICAL to the one I lost. I was iffy at first but I wasn't going to leave her behind just because I had her sister :( the new one is doing MUCH better.
Oh yeah, I'm so sorry :(
Wow! 12! You're so lucky! *day dreams about all the bettas I'll have when I'm older*
haha my parents don't get the whole Betta loving thing. They think I'm nuts. Would love to see pics of the Betta you get tomorrow!! :D