So my green severum and convict cichlid were recently removed from my 75 gallon tank after they started killing all the other little fish (Swordtails, Danios, etc.). I now realized my they got so mean. After I took them out I caught my synodontis eating a bunch of eggs attached to the bottom of the castle bubbler. I wasn't able to save any eggs though

Now they are in their own tank. Do you think they will breed again? They are not fighting (a good sign?) and they share a piece of
PVC pipe. The severum is about 5 inches and the convict (female) is just over 3 inches. Has anyone had this happen before?