Okay I have a 29g planted tank that has been running with 5 cories with the expectation of turning it into a betta sorority. Well I decided to add my 7 girls to it a little bit ago and I'm getting some pretty nasty aggression from 2 of them.... They are biting and the one has already taken a pretty sizable chunk out of the other's fins and when they lose sight of each other they seem to go after someone else. Is this normal? I'm really concerned that they'll hurt each other and I can't salt because of the plants. I read that it would be kind of spotty for the first couple of days until they established a pecking order but I wasn't expecting big bite marks in fins in the first 10 minutes. Should I seperate the trouble makers? Thanks!
Oh and I forgot to give the history of the bratty girl. The one that seems to be the aggressor used to be quarantined in a divided tank with one of the other girls. One night they breached the divider and one was all beaten up and the other one didn't have a scratch on her. I just figured that one was a fighter and one was a victim, but the victim from that fight is the one doing the aggressing now. This was months ago and she is all healed up(well was until a few minutes ago when she got a chunk taken out). Now I'm wondering if she's aggressive but just really bad at it and baits others into fighting and gets her butt kicked.
Oh and I forgot to give the history of the bratty girl. The one that seems to be the aggressor used to be quarantined in a divided tank with one of the other girls. One night they breached the divider and one was all beaten up and the other one didn't have a scratch on her. I just figured that one was a fighter and one was a victim, but the victim from that fight is the one doing the aggressing now. This was months ago and she is all healed up(well was until a few minutes ago when she got a chunk taken out). Now I'm wondering if she's aggressive but just really bad at it and baits others into fighting and gets her butt kicked.