Introduced a 5 inch female FH to a 55 occupied by a 9 inch male.. they immediately hit it off really well.. swimming together.. rubbing against one another.. swimming in circles.. sleeping together.. then they cleared the stones from one side.. got super defensive and together attacked everything that entered the tank .. mostly whenever I tried cleaning the tank.. and it stayed that way for about 2 weeks.. then suddenly the male started attacking the female and for about 10 days now, she is hiding inside a clay house which he cannot enter into.. she hasn't even ventured out for eating.. well??