Can take over an entire tank of goldfish quickly. The symptoms of Velvet include a thick slimy coat over the body of the fish and white/yellowish patches on the skin. Velvet is typically introduced into the tank by new fish that were not quarantined prior to introducing them to the tank..
In order to treat Velvet, you should purchase a medication from your fish shop that contains Formalin. This is added to the tank for three days and usual does the trick.
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