Hello! My sunset butterfly fish developed light brown spots the past few days. It’s been in a quarantine tank with coral beauty angel, damsel, and cardinal fish for about 3 weeks. I did one treatment of Prazipro 10 days ago when I briefly had a wrasse in the qt tank that I ended up returning to my local fish store due to suspected parasites. It’s still eating well and swimming around. Any ideas what could be happening and how to best treat it?