Coral Disinfectant. Ideal before introducing new corals to the aquarium. Reef Dip contains complexed elemental iodine as a protective coating to safely and gently disinfect corals. It is effective against bacteria, fungi and protozoa. It can be used as a preventive measure or to treat diseased corals. It can be used with both hard and soft corals. It is also safe for anemones and polyps. Reef Dip provides a protective layer that covers the coral, keeping the iodine in contact for a long time on the infected area. In addition, this layer prevents infections from re-colonizing the wounds. 500 ml treat 400 l.