100% natural, premium marine substrate, straight from the ocean to you. Contains natural live marine bacteria.Contains live marine bacteria to quickly stabilize your tank.Removes nitrogenous waste.Restores natural organic balance.Contains more than 10,000,000 hetertrophic bacteria per pound.This product is natural, not artificial--prevents bio-fouling.Contains live marine autotrophic bacteria to provide a proper inorganic balance.Contains live chemolithotrophic bacteria.Beneficial characteristics of aragonite:Reduces harmful nitrate.Maintains proper pH.Provides enhanced buffering capacity.Provides essential inorganic elements such as strontium, cobalt, zinc, and molybdenum.Essential trace elements provide by Bio-Activ Live Aragonite: zinc sulphate, calcium chloride, manganese chloride, cobalt chloride, copper sulphate, sodium molybdate, strontium chloride, nickel chloride, potassium bromide, sodium silicate.