Arag-Alive Hawaiian Black 9kgBeautiful marine substrate packed with millions of heterotrophic, autotrophic, and chemolithotrophic bacteria. Huge beneficial bacteria population aids in waste reduction and dramatically reduces cycling time in new setups. Use alone or to kick-start existing substrate bed. Arag-Alive is specially egineered to supress "new tank syndrome" and compress the ammonia cycle. It's like having a nitrite and nitrate filter, ammonia reducer, and a high-capacity biological filter for your marine aquarium. Includes Bio-Magnet clarifier to clear water fast and enhance biological efficiency. Arag-Alive marine substrates contain aragonite, a source of calcium, carbonate, and beneficial trace elements to, naturally maintain proper pH without the constant addition of chemicals. Lowest in phosphate and does not contain tar, harmful organics, silica, or other impurities. Used by the foremost public aquariums, research and government institutions, and professionals worldwide.