... macroelments and microelements 3)For corals,ornamental fish Blue Treasure Coral Reef Sea Salt 20KG Bucket 1)Synthetic Sea-Water Salt ... calcium(Ca), magnesium(Mg), iodine(I), strontium(Sr), molybdenum(Mo), iron(Fe), rubidium(Rb), manganese (Mn), barium (Ba), selenium ( Se), fluoride ...