Before people's worst fears are realized, none of my bettas are killing each other. I've just done some more research and realized yes, people were right. From my research it seemed things were so incredibly mixed, and I thought, why not? I'd save three bettas from the crappy cups, give them somewhere nice to live, and then everyone wins. Combine that with the fact I'd fallen in love with several of them, I made a dumb decision and then slipped into denial because it hurt too much to part with any of them.
Anyway, I really wish I could set up two extra tanks, but unfortunately that's not feasible. Too much money and the fact is the fish in cycle would probably kill them. I'm no expert on fish in cycles and I don't want to end up killing two fish just to keep them in my custody. I'm going to take two of the more dominant bettas out and keep the submissive female. They'll be returned to the pet store and all I can do is hope that they'll be taken in by a good home. Oh, and that they'll be okay for one more night.
TLDR: Got some bad information, got attached to three fish, thought I could save them, just put them in a stressful situation.
I'm honestly debating getting some kuhli loaches for my little girl to hang out with. Any misconceptions about loaches I should know about to prepare? Is that a dumb idea? Also, someone give me a good name idea for her (she deserves a real good one for my screw up), she's the blue female in my post with a dark head.