Thrive Iodide is designed to increase iodide levels in your salt water reef aquarium. Most reef aquariums will need supplementation of iodide for all inhabitants to thrive. Invertebrates, such as crabs and shrimps need iodide to help with the moulting process. Iodide is constantly depleted by skimmers and activated carbon. The chemical management of salt water, reef aquariums is a delicate balance. The Thrive products and Thrive Analytics were created to help you simply assess and adjust the balance of your saltwater aquarium system.