No offense, but I disagree. Domesticated male betta splendens are born killers because that is what they have been bred to do by humans for hundreds of years. Females can also be highly aggressive. Yes, individual bettas can be more mellow than others, but aggression is instinct and they can change in the blink of an eye. They're not the same as wild bettas. And besides, a 10 gallon is much too small to attempt this. Even in the cases where I have seen it being done (which I do not condone), it is usually with at least 50 gallon tanks.
How long have you had this crowntail male? For maybe a few days? If you have other tanks, why are you keeping them together at all, especially since you say you move the female back and forth because you don't trust them alone together? You're subjecting the fish to unnecessary stress, which in my opinion, is very cruel. It all seems pointless to me.
Last edited by Fenghuang; 08-07-2013 at 01:51 PM.