oranda

As the title says what are some ways to groom oranda goldfish? Thanks to anyone who gives me tips in advance!

Hi, this is my first post in this website, so hello guys :). So, two days ago I bought a black oranda goldfish. When I got him I noticed there was a dangly piece of scale on his side, but didn't think much of it. The following day I noticed that a second one had appeared on his other side. So...