I had a docile 18inch rtc in with these up until last week, broke the heater and killed himself!-( was eating out my hand and there was fish below 3 inch aswell as all my other stock an that was in a 190! I know everyfish is different but hey! I'm thinking most of the cichlids will be going tbh, I picked up a 14 inch jardini today cause it was mega cheap for my area, 60 pounds, about 85 bucks?? Anyone? I'm thinking maybe rtc for a while!-) snakehead, giant gourami, african pike, and jardini would be cool!