Easy-Life Jood is a strong and concentrated iodate/iodide source for vibrant and healthy corals. The product is multiple stabilized. Iodine protects coral against UV radiation and forms a natural protection against all sorts of parasites. The optimal concentration of iodine (which is a combination of iodine, iodide and iodate) is 0.06 mg per litre (ppm) in a marine aquarium. Easy-Life Iodine contains iodide and iodate in the most optimal ratio and is ideal for compensating for a deficiency.Dosage for Easy-Life Strontium: add 10 ml per 500 litres of water once a week.