Hi My newest cloud minnow has a little black spot on her side. I didn't notice this until so don't know if its new or I brought her from the Lfs with it. She is perfectly healthy in every other way, schooling and eating fine. She is golden and light in colour. I have had her two weeks. She's settled in fine with my two other cloud minnows a boy and a girl I intend to get two more to join the school. What do you think this spot is? I have done a 3day dose of Melafix to help heal it if it is a nip from another fish. When I first got her the other female Cloud did chase her a lot and bully for a day or two.