... etc., and other elements harmful to sea creatures such as Os, Be, Tl, etc. Synthetic sea saltis pure and not contaminated,contains no ... petroleum hydrocarbon, etc.,which always exist in natural inshore sea water.But never add any nitrate, phosphate or anyother ... , oil, etc. The artificial seawater formulated by TLG sea beast sea salt is a kindsof excellent medium that has arelativelyconstant pH ...