Recently I noticed my female blue gourami had some scale damage on one flank and a pinkish spot on her ventral surface right behind the pectoral fin. I assumed it was caused by an accidental collison with a rock, and began using Melafix. It appeared to improve at first. Today, the third day of the Melafix treatment, she looks worse. She has several pinkish wound-like spots and the scale damage looks worse. Help!