I just acquired a Powder Brown Tang after a couple days in tank notice some white spots . Small cluster on back right Side as well as one spot which looks like it is flowing in current. Not sure if this is considered ich or nosomething else . Did not quarantine fish when I got him he looked ok . My tank is new setup with just a couple clowns and 1 Bristletooth tang up for about 5 months . 20% water change every 10 days. Not sure what it could be any help will be appreciated.