Arcadia Coral Dip sterilises and prepares your corals before introduction to your aquarium. Coral Dip is effective in expelling the following parasites: Acropora Eating Flatworms, Montipora Eating Nudibranchs, Zoanthid Eating Spiders, Red Flatworms. It also performs very well in the treatment of Rapid Tissue Necrosis & Bacterial Infection. Contains no iodine. - Sterilises and prepares corals - Contains no iodine."