Rapid treatment is mandatory for the survival of the fish. In a reef tank environment, the infected fish must be moved to a hospital tank for treatment. Never add copper compounds to an aquarium containing invertebrates . Some new treatments have appeared on the market recently which claim to control parasites in the marine aquarium. Consult your local aquarium dealer for more information.
Stress breaks down the protective mucous coating on a fish and allows parasites to gain a foothold.
Additionally, any new fishes should be given a short freshwater bath and kept in a quarantine tank for two to three weeks before being introduced into the main aquarium. The use of an ultraviolet sterilizer has also been shown to help prevent outbreaks of this disease. This disease is caused by small parasitic worms. The black spots are usually not as numerous as those in white spot disease. Also, black spot disease is not nearly as deadly.