Thanks for the info you guys.. I guess I'll tell the guy I can't have them then. I really can't have more than 3-4 and I'd rather have them all be the same than have one lonely one. Don't worry Diablo, I have sand that is not an issue. I'll just wait for my lfs to get them and buy ones that are the same. :)
My bettas don't usually show aggression to any other fish, only other bettas. -__- The oto and platies live with them quite peacefully. Only on the first dat they're introduced, the girls are a bit pokey.. And since cories seem to be peaceful, aggression shouldn't be a problem. :)
I wanted to get my oto more friends but they drop like flies.. :/
"You are forever responsible for what you have tamed."
Betta love: it's an international thing.
Azure, Sterling, you will be with me forever. Peaches, my crazy girl, I'll miss you the most.
The Boys: Tranny, Inky "Yume" Zuko, Mao, Onishiki, Chopin, Maelstrom, Kabuki
The Girls: Kamikaze, Beeuty Qveen, Beefcake!, Chunkers, Awesome Sauce
Meeces: Koko, Bijli, Baadal, Barkha
Turtle: Hi Handsome (female -__-)