I bought my krib first and he killed my baby albino oscar by bullying it - oscar kept to the top and kept trying to get out the water and i was told that he was trying to kill himself

sadly i never got him in time.
I was very nervous about putting in anything else with the krib in fear of him killing them. But recently i purchased a pair of jewel cichlids, they were fine at first but all of a sudden the female got fat and began chasing the krib about but no damage, it looks like a game of tig at times where one chases then they turn round and chase back.
now the female is thin again - im guessing shes laid her eggs but i cant find them but i believe they are in an ornament shes sticking quite close to.
Jewels appear to be less agressive than kribs and put together they form a sort of Stale-mate situation so they both seem to live together happily, sadly i was told a shawl of white mountain minnows would be fine in the tank with them but sadly that is not the case.....they appeared to be fine, they got chased but they were never attacked but i started with 6 - woke up next day to 3 came back at night and now we have 2 - no remains - no nothing, they look too big to fit in their mouths so they must have bit them and eaten them because there is no traces of the missing 4.
anyways - back on track, they seem to be fine with other cichlids from what im seeing, but they appear to be nippy little tykes when pregnant but bareable to other fish
