Why is iodine required Corals might require iodine as a detoxifier as a protection against uvradiation and as a natural defense against many parasites. Iodine is present in NSW Natural Sea Water in a very low concentration 0.06 mgL or 0.06 ppm. Iodine occurs in NSW as different species. These include iodide iodate molecular iodine and hypoiodite. Generally when we say iodine we mean one or more iodine species without a clear distinction being made. NSW contains predominantly iodate and to a lesser extent iodide. There is however a misconception among many hobbyists that iodide predominates in NSW. Research by Salifert and universities has proved this to be untrue. About Natural Iodine Saliferts Natural Iodine supplement contains a large portion iodate and also some iodide in similar proportions as NSW. All ingredients are of a pharmaceutical quality or even better. This ensures that no unwanted elements are added to your valuable aquarium. Other requirements For excellent results try also our highquality calcium strontium alkalinity and trace elements supplements. Directions Shake before use. Regular maintenance Dose 5 ml per 100 liters 25 gallons once every 2 or 3 weeks. Adjust dosage according to individual requirements use an iodine test e.g. Saliferts Iodine ProfiTest. Every 5 ml per 100 liters 25 gallons will increase the iodine concentration that is iodide iodate by approx. 0.04 mgL. Keep out of reach of children. In case of contact with eyes rinse with plenty of water. Only for aquariumhobby use. Not for human consumption directly or indirectly