aggression problems will rise.. you would want to put in atleast 6 aros to calm them down.. but i never heard it being done in a jar.. but if you would like to try, im sure many will be watching the progress.. lol
the cichild didnt get along with the friendlier fishes in the other tank. then my dad told me throw it back in the jar tank with somethign for him to hide in. i followed his directions and by morning i found the cichild dead inside his little hiding ordiment. after i pulled the dead cichild outta the tank i tried to find out how he died and i didnt find any bite wounds on him. kind of mysterious...