Join Date: Apr 2013
Location: Alberta, Canada
I have a 10 gallon sorority, and it's fine. Right now, looking at it, I really feel as if they'd appreciate a 20 gallon + more though.
However, if a 10 gallon is all you have, then just make sure it's heavily planted/decorated and give the bettas the opportunity to claim their own territory. I wouldn't go over 5-6 females in a 10 gallon. I'm lucky, cause I have a gentler group. Sure, in the beginning they were all about fin ripping and tearing, but once their pecking order was established, I hadn't seen a rip in any of them.
Good luck, and let us know how it goes!