those fishes aren't sick....Also, I'm not really sure holding the fish up for a picture for a few seconds is really a big deal. If it is, you might want to let the vendors know who do this same thing in the Marketplace forum when taking a photo of a new fish they have for sale.
That aside if your hippo is doing well other than the disease you might concider puttin it back in the main tank and adding a cleaner shrimp.
That aside if your hippo is doing well other than the disease you might concider puttin it back in the main tank and adding a cleaner shrimp