I started a sorority 3 days ago in my 16 gallon, and started with 7 girls.
Today, I came home from class to find one dead. Pretty sure the death was at least partially caused by the other girls, but can't pin down which one as I wasn't home. I usually get home before my tank light turns on, but I missed my normal bus--I pretty much came home minutes after she kicked the bucket; even the other girls hadn't noticed her yet.
I am a little upset, only because I had thought the worst of their fighting had seemed to be over--most of the stress stripes had disappeared.
However, I'm uncertain if I need to take any steps with the other girls... they seem fine, very little "bumping" confrontations since I came home and found the dead one, they don't bother my cories, and overall the fin-damage has been pretty minimal. I'm even unsure if they're solely responsible for the death of the crowntail female, except for the fin damage she had taken, since there were no obvious injuries on her body.
I still want to continue my sorority, my remaining 6 girls are very entertaining and a pleasure to watch... is a death normal? (I feel bad, since I'm only gone 3.5hours in the early morning for my summer class...) Especially since, for the most part, the remaining 6 are behaving pretty well for a new sorority...