my fish came in sick . and i didn't know it . i ordered two pearl scales. and they came in and i saw that the smaller one had black spots on its fin so i separated it . the other one was thinner and was all white and its eyes where kind of all black but i never really had pearl scales before so i thought it was fine . big mistake , a few days later the small fish was getting better as the other fish was pushing the other pearl scale around so i separated it and then it stopped eating and going to the side. i found out later it had swim Blatter disease.