Blue Treasure SPS Sea Salt is further purified based on Blue Treasure Reef Sea Salt. The new formula of Blue Treasure SPS Sea Salt is specialize developed for the growth and breed of SPS. Specially formulated with SPS required levels of calcium(Ca), magnesium(Mg), strontium(Sr) and other essential trace elements of natural sea water. Also, more Ca, Mg, K and other trace minerals are supplemented so that can keep the enough essencial elements to SPS duing keep and breeding. Only can meet the requriments of keeping and breeding of SPS through change the saltwater mixed by Blue Treasure Sea Salt.