I have two sororities, one with 9 pet store bettas (20g) and one with 6 AB girls (also 20g, cycled wth tons of fake plants and hiding spots. They were supposed to be in a 33g but having a few issues with the canister filter at the moment, will be hopefully adding a few more females into the 33 gal when I get it sorted out.)
The "pet store" sorority has been going on for about three weeks. When I first put them all together there was... a little bit of chasing. That's it. I was pleased and relieved. Everyone seems to get along well so far. No problems.
The Aquabid sorority... Put them all in yesterday morning because I am free and able to be home all weekend. Two of the females hate each other. I will call them fish #1 and fish #2. Lots of flaring and posturing and tail slapping. When the biting started I removed the one that I thought was the more dominant one (fish #1) and put her in a containment tank that hangs in the main tank. After that, things were pretty good, some flaring and chasing but nothing too scary. Fish #2 alternated between patrolling her newly won territory, and resting wedged under a piece of driftwood or other hidey spot, as she was clearly tired out from all her flaring and patrolling. Fish 2 is now the alpha fish, and everyone backs down and she doesn't try to hurt anyone if they submit to her will. Fish 1 is still in her containment tank as of this morning, and not very happy about it at all.
My question is what to do about fish 1 and 2. Should I take fish 2 out for a while and introduce them both again at the same time? They both seem fine, more or less, with the other fish as long as everyone respects them. But neither one of them will back down to each other. I have a feeling that fish 1 will be living her life alone, which is fine and i have extra tanks ready knowing that this might happen, but I will try again if there's a chance I could make it work. Suggestions, comments, etc. are welcome and appreciated.
Here's a few pix.
Fish 1 in her containment tank.
Fish 1 and 2 (both on the right) hating on each other.
A few more random pix of the girls.