Aweh that's so sad! :( Velvet is hard to detect. Usually you only find it when you turn all your lights off and shine a flashlight on him. You'll see a rusty or gold powder around/on him.

Just wanted you to know Twin Finn died of Velvet this morning, I don't think I caught it soon enough =/

Thank you for the picture comment! Your twin Finn is a very handsome fishy too! :)