Can you keep a green terror with stingrays.I have two pups about 5 to 7 inches and the green terror is about 6 to 7 inches and very docille.It even got beet up by another ciclid half its size.
It's a risk and you know it otherwise you wouldn't ask. I can only suggest trying if you have ability to separate immediately and the time to watch closely. I have had success with a large pike cichlid and had no trouble for months and I'm still ready to separate.