Originally Posted by 10asartin
With deciding on who's most/least aggressive it really can't be decided until they are all in the tank together. Size doesn't really help you determine either, because my girl Lily who is by far the largest girl is at the bottom of the totem pole right now with tattered fins. Also, the girl I pegged to be least aggressive before releasing them is the most aggressive at the moment.
I feel like it is easiest just to release them all together and not worry about least or most aggressive.
Exact same thing happened with my tank- the girl I thought was "least aggressive" was the alpha for a few days, then got pegged down my "second least aggressive" who now happily resides at the top of the food chain XD