I have had my two pink tailed chalceus for almost 2 years now and they have never had a problem just being the two of them. The only other two fish in the tank with them are two cichlids. I am an armature fish keeper I will admit it, and that is why I am here. I have read on this sight that theses are skiddish fish that do not do well in small groups. I am kind of worried about my fish now. Seeing that they should have large tanks and I only have a 30 gallon tank. They have been through power outages that have dropped the temperature and I have had trouble with pH and hardness but they have not seemed to mind. Are these fish as resilient as they seem? Is the behavior I am seeing abnormal of theses fish? Also I decided a while back to to get to know my fish better than just cleaning their tank and now they eat shrimp from my fingers when I offer it to them. I did not see this to be a problem since I do not intend of releasing them into the wild but I am worried the behavior is too abnormal for the species. Can anyone give me any feed back on whether or not my fish are ok or if I have messed them up terribly?