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white scratches

  1. General Reef Discussion
    Hi all, I added a Desjardinii Sailfin to my 300g reef about 3 weeks ago after 2 weeks of QT. The fish was active, healthy when I introduced him, and at a glance the same appears to be true today. However, on close inspection, I can see "markings" on the body of the fish. It's not ich or velvet...