I have a Fluval Flex 10 gallon tank. It is cycled and I would like to get lots of plants and turn it into a Betta tank. I was planning on getting one female Betta for the tank but Petco keeps a tank with a bunch of female Bettas in it. I know that Betta sorority tanks are a thing but I'm not sure how or if I can do that with a 10 gallon. Would a sorority work? If so how many female Betta do I get? Thanks in advance.