The Goldfish Sanctuary
Symptoms: tiny gold or yellow specs covering a fish's body, fins, or gills, Rapid gill movements
Similar to ich, but much more difficult to spot (especially on a gold-fish), Velvet Disease appears as a very fine yellow or gold dust. The gold specs are small and often numerous, usually appearing first on the back of the fish, eventually spreading to other areas of the body and gills. Checking a fish's transparent fins is often the best way to check for Velvet. Although the disease may not be present there, if it is, it will show up much more easily.
Because Velvet Disease has a lifecycle like that of ich, it is advised that treatment at full strength should occur for at least 10 days. Further, because Velvet also uses light as an alternate energy source, shading your tank may also help speed recovery.