Just glancing at the female's eyes the first thing that came to mind was a bacterial infection. Get her to a vet ASAP... Otherwise I don't think she has a chance (I'm no expert, but those eyes really don't look good). At least she's still active and eating. Maybe it hasn't spread anywhere but her eyes.

Meanwhile, I'd suggest using COMPLETELY different equipment for her and keeping her in a different area from your other tanks. Maybe even the male too, if they came from the same place. Just saying, it would really suck to have your other animals coming down with whatever that is.