I have a 20 gal. tank, with 1 male white Molly, 1 white fem. molly and 1 Dalmatian molly, along with a 2" Cichlid and my birthing tank. Over the past week, my husband has pointed out that my male molly has been slowly turning a grayish color, from top of his body, towards his belly. Is this normal, or could he possibly have a disease that I should be concerned about? I know, recently, the 1 fem. Dalmatian Molly I had, literally jumped out of the tank while we were out of town and has died. Could he be stressed over it?

Somebody please help me here. I have taken in this wonderful hobby and I truly adore my new found friends, I'm really concerned about this.
~Johnnie~