Ive just added my 12in common plec in with a 8in and theyre at it, ( in a 1000l with rocks) Im hoping they dont knock any rocks off into the glass and smash the tank :evil: do they find a pecking order or do I need to seperate,not to worried about the plecs -battle scares are cool,but the other fish might get in the way, ???????????????

commons are notorious for being territorial sadly. im not sure if they stick to their own species to pick on but i wouldnt assume so going by some of the other plecs ive read about.

when i had two in my tank the bigger one would harass the smaller one every time he saw it, he even went looking for it sometimes even though i had plenty of hiding spots. the smaller one became very shy and it wasnt until the bigger one died that he became more active.