One of my mollies gave birth to 24 babies about 2 weeks ago. A week later I noticed that she might have had curvature of the spine and this white stuff on her head. Actually, I don't know how to treat the curvature of the spine. So, I treated her with Maracyn (erythromycin) for body fungus and Maroxy for true fungus. A few days later, her spine came back to normal.

I have treated her for 5 days, but she still has got this white stuff. Should I continue? Any ideas? The water readings are fine.
P.S. I have attached a pic of my molly.
Here is the pic.