input on riverine stocking idea

Bought myself 6 jewel cichlids. Got them from petsmart so i have no idea which specific one they are. Im hoping to have a 3 species tank once they begin breeding. Im waiting on a pair to form, i also want to get a group of kribs to get a pair. Then remove the others and just leave the pairs, and add a group of 6 or so congo tetras for dithers. Tank is a standard 55.
To try to cut down on aggression as much as possible i was thinking puting a bunch of territories on each respective end of the tank and leaving the center of the tank a little sparse so that their breeding sites would be as far apart as possible.
Ideas and input? Never done riverine cichlids before and any advice or personal experinces would be helpful and appreciated.
To try to cut down on aggression as much as possible i was thinking puting a bunch of territories on each respective end of the tank and leaving the center of the tank a little sparse so that their breeding sites would be as far apart as possible.
Ideas and input? Never done riverine cichlids before and any advice or personal experinces would be helpful and appreciated.