I have a 180 gal I got from my girls parents. I currently have a 8" oscar that I think is wild, a cichlid that is about 6" not sure what kind, its long and skinny with stripes, also two spotted plecos. But heres the question I want to put a green terror or a flowerhorn in the tank. Possible? If not what other kinds of cichlids can i put in there? It just looks empty to me?