Ah. Sorry for my confusion. 240 liters is only a bit over 60 gallons. I'd be careful adding non-cichlid fish, as it doesn't give them much escape room if your cichlids become aggressive. Many cichlids show only mild aggression to other fish that aren't conspecific, but, like people, individual piscean personalities vary.
I've got the red tailed shark in there with them and a pleco, and all seems to be doing ok. Other than that, its all Cichlids. I'll leave it at that I think. View attachment 292970