Two days ago i decided to get convict cichlids. I got two of them a male and a female for my 35 gallon tank. The female is bigger but not by much. The only problem im having is that the female is beating up the male, chasing him around and nipping at his fins. Is this normal? I have two caves in the tank to hide out in and a rock. Also, any other information about convict cichlids would be appreciated! Im really interested in these little guys.