I guess you didn't get the hint the first time around? Wow. Green T E R R O R, that name should tell you something right there. I know for me I figured it out before I even read about them. They get a name like that for a reason.
Ok you got one problem already, in that you are keeping an African with South Americans and only the most experienced of cichlid keepers do this and even then, not very often. The water chemistry needs of the two groups are completely opposite. I don't buy much into this tank kept fish can deal with it malarky. Fish evolved out of certain conditions and it doesn't make it right to keep them outside of those conditions just because we can.
Secondly, you are trying to house two fish that are rule the tank non community type fish with another that is from a different part of the world and doesn't grow as big and doesn't have the same mind set as the other two. It's simply a matter of time before they take the Jewel out and then go after each other.
You realize the space you need just to keep those Terrors?
