I had one in my 220. He'd grew from 1.5" to 4" in about 3 months. He was fine for a while, but he went nuts and killed a 4" FM, shredded my beautiful 6" green sev, had all my other cichlids hiding all the time. He would even bow up at my 8" WC true green terror. So I had to get rid of him. He was a beautiful fish though. GL.