You shouldn’t remove some of the fish. You should remove majority of the fish. Even if the Festae is a female given their track record she will likely snap and kill everything else once bigger.shes a female and I’ll be running a fx6 will that still be ok or should I remove some
Filtration is negligible in this situation as that isn’t the problem. The problem is you are mixing so many large growing and notoriously aggressive species that you will either end up with all the fish dead due to aggression or disease or end up with one fish that has massacred all the rest.
Everyone who has commented on your thread has said similar things. I highly suggest you heed the warning.