I have 6 females in a 10G tank, and it's by far my most favoritest tank ever!
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Here's the tank:
It's slightly changed since then - like some of the plants are gone, added some hidey spots, etc.
Here's a closeup of one of my girls in it:
I have a large cave, a bridge, a 1/2 log, 2 small rock caves and a large piece of fake driftwood in their tank. I also have plants in it - not enough at the moment and I need to get some more because one of them is harassing another merciliessly and that didn't start until I removed some of the plants.
So, you can do 5 or 6 comfortably in a tank, but make SURE you have lots of safe hidey spots and lots of plants. Also, keep an eye on them. You might end up with one that is just a supreme b*&ch and you might have to yank her out. I have one like that who I'm afraid I might have to yank. They are so fun and cute to watch - they are such snots, and are after only one thing - FOOD!
And as for flaring - Six flares and then swims the other way as fast as he can if you so much as look at him the wrong way. Jasper flares at pencil erasers mostly - he's a beast if there's another fish anywhere nearby... Jack flares like mad at his reflection and does the "I'm way bigger than you, buster!" dance when the light in his tank goes on. Lucky flares at Louis (the blind betta) but gets bored because Louis doesn't flare back. On to Louis - he doesn't flare at all (well, cuz he's blind and has no reason to lol). Petey and Gabriel flare at cereal boxes and soda cans. Nothing else bothers them except each other - they're in my kitchen and whenever the cereal boxes or soda cans are set next to them they go to town. And Archie - well, he flares at Uncle Alfredo, our large red stuffed bull:
And my GIRLS flare at each other for no apparent reason. They just hate each other on some days. They're just total hags when they wanna be.