Fauna Marin Professional Sea Salt 25kgProfessional Sea Salt contains all of the important macro and trace elements in the correct relative amounts that reflect as closely as possible the mix that occurs in natural seawater, and provides your corals with all the essential minerals in bioactive form. Professional Sea Salt has been specially developed for coral breeders and aquarists with the same professional standards. As a well balanced allrounder, it gives you the best results when used