After having an ich outbreak I quarantined all my fish for 75 day. Display was completely fallow for the full 75 days and no coral or anything else was added. While in the quarantine I dosed cupramine at .5ppm for 3 weeks, prazipro for 2 weeks, and cupramine again at .3 ppm the last 2 weeks before the 75 days were up and transferred my fish back to the display. The next day I see spots on my blue hippo but not small like ich but a bit larger. Dosed my display with prazirpo to treat for flukes. Now 2 weeks later this is what my powder blue looks like. I have no idea what it is and how it survived a 75 day fallow period of living in my display! Any help is greatly appreciated!!