I have a 10" Festae male in a 120 gallon tank, and a 7" female in a 90 gallon tank. The Female and male where together when young in a 300 gallon tank along with other cichlids, but not together as adults. I would like to reintroduce them as adults in the 120 gallon which the male Festae currently occupy. Should I put a divider in the tank first before adding the female Festae to the males 120 gallon tank or should I just add the female Festae to the male tank without using a divider?