my opinion...if you want color, then you should go for marine tank, fish only. Any of the "red terror", uropthalmus, or festae are very aggresive cichlids. Some cichlids would be OK, but cichlids are unpredictable. your peacock bass might end up in the corner of the tank always..or the rays might get their discs nipped at. i would hold off to buying one until, you know for sure that someone has done it successfully.