Many years ago I had one and didn't really know what I had at the time. I mean I knew it was a Red Devil but just had no idea how nasty they were way back then. I had mine in a 90 gallon alone and Someone (Idiot) told me to go get some blood parrots to house with it. So like another idiot I go out and buy two blood parrots and put them in the tank. At first I was like, oh wow, he really likes the pretty blood parrots. They were swimming around together. I think I went into the kitchen to get something and came back about 10 minutes later and both parrots were totally gutted. I mean everything was gone in the stomach. Totally gross. The red devil was just swimming around like nothing had happened. I haven't tried to own one since but can see that attraction.