The RG are agressive toward each other unless they are mated or it is a large tank.
Choose a healthy fish with no missing scales, spots or ripped fins.
They seem to do best in good water quality.
They will eat pods and any other live food and they will eat flakes and other prepared food.
They are alittle strange at their swiming habits. They will go in caves and rest under corels. Sometimes resting straight up or down, sometimes upside down. They don't swim to much out in the open. They will defend their territory by opening their mouths real wide.
Great fish, enjoy.