Congrats on your pick.
I remember I started out with 6. I had them all in a Madagascar themed tank with Paretroplus Dambabe, Maculatus and Menarambo. I also had some Nics, Cyrtocara Moori, Tilapia Snyderae, and spilurus.
Eventually they had grown to about 3 inches and started to pick on each other. 1 was killed. Then it stopped for a while. At about 5 inches 1 more died. Eventually they started picking on one more fish and luckily i was able to save it. A pair had formed and had terrorized it. It lost its tail, its caudal and anal fins but today it's alive and well. They're all between 6-7 inches now. The guy never grew back his tail though. But they do grow in size pretty fast.