Cichlids of different regions have evolved to use different signs and displays to mark territories and warn intruders of their presence so Cichlids from a different region may not recognise the warning signs which leads to violence.
interesting i didn't know that.
just out of curiosity do you think them being F0 had anything to do with it? I know F0 fish can be less adaptable to changing water parameters than tank bred strains, just wondering if the same could be applied to they're acceptance of tankmates or simply of being in a tank not the wild?
I've seen it done a lot of times and have heard comparitvely few reports of trouble, enough for me to think that when people have problems it's simply because of the individual cichlids temprements or because they were preparing to breed and cichlids breeding can cause carnage in any tank regardless of tankmates
anyway i said i wouldn't argue it and I'm going on as per
I've not done it myself so can't speak from personal experience, but I know cichlids in as much as you can never know them cos they're all so different!