... Pro Size Box, Aquarium System 1). Blue Treasure SPS (Stone Coral) Sea Salt is Specially formulated with required levels of calcium, magnesium ... , strontium and other essential trace elements of natural sea water. 2). Contains the entire essential major, minor and trace ... ,iodine, iron,cobalt, selenium(Se), and many others . ItemsSPS Sea SaltNatural Sea Water(S=35‰)(S=35‰)d(t=24°C)1 ...