It all depends, Itsy... some have peace from the get-go, while others witness the pecking order being established a little more aggressively. They certainly have lots of room... you may want to add more... so there are lots of peaceful areas for them to retreat to. Keep a close eye on them in the meantime and hopefully, the few nips will be done with and they will live in harmony. Have you been able to establish who the main aggressor is? Or are they all taking turns? Any other inhabitants in there besides the girlies and the pleco?

And perhaps, someone else here who has experience with sororities will have some more advice.

Any chance of some pics, Itsy? I hope they settle down soon.

Michele