Honestly, Lisa... I've read your post this morning but was kinda waiting for someone else that may be better at answering this question. If it were me, I wouldn't chance putting any betta's in there at all because I've heard horror stories of the male just completely harassing them regardless of male or female unless they are mating, evident by the male building the bubble nest.... whether the females can interact peacefully, I really don't know but I would just leave well enough alone as it is. Betta's are perfectly fine by themselves. They are not like cories or tetras, feeling the need to school.... With an LFS that you felt you had to rescue a betta from, you might want to be a bit more reserved to taking any further advice from them....
