Iodine (I) is an essential trace element in seawater and likely one of the most important traces, playing significant roles in the physiological and ecological dynamics of marine organisms, including algae, corals, and microbes. As per Reef Zlements mixing classification Iodine is a Type A element. 1 ml of Iodine Zlement increases the Iodine concentration of 100 litres by 100 μg/l.
