I have two clowns. A female and Male. The female had white stringy poo and i have been treating them with metroplex and focus. Besides the rock i have one large sea shell I put in that my wife wanted in there. Since the beginning the male always went in the shell. The female hung out under one of the rock bridges. Today the female has been in the shell all day. I can see her from the side of the tank in the shell. Not sure if she is hiding out because she is sick or just hanging out. Any help on why she is acting like this or is this normal behavior for clowns.