Features:Overall mineral supply for reef aquariumsTropic Marin® All-For-Reef Powder is an ultra-concentrated mineral blend, with which an easy-to-use, highly concentrated all-round solution for supplying all key minerals and trace elements in newly established and averaged reef aquariums is available after being dissolved in reverse osmosis water.Through the growth of organisms and other processes in the aquarium, minerals are consumed and must therefore be supplemented regularly. These include, in particular, the necessary elements calcium, magnesium and strontium, as well as carbonate hardeners for the growth of calcium carbonate skeletons in stony corals, lime red algae and other reef organisms. Tropic Marin® All-For-Reef contains all of these components in a highly concentrated form. In addition, all essential trace elements are also included: Iodine, bromine and fluorine for the growth and strengthening of skeletons in horny corals, sponges and crabs; selenium for eliminating free radicals, and iron, manganese, zinc, copper, nickel, chromium, cobalt, molybdenum and vanadium for the development of important enzyme complexes.With these components and balanced in its concentration ratio, Tropic Marin® All-For-Reef creates the best care conditions with just one solution. There are no additional compounds (e.g. sodium chloride) that alter the salinity or ion balance.