Bio-Activ Live Natural Black Live Cichlid Sand African Cichlid Sand, Stones and Gravel for a Healthier Aquarium. No Waiting... Just Add Fish! Maintains proper PH for the Life of your African Cichlid Aquarium Contains Natural LIVE Bacteria to quickly stabilize your tank FOR A HEALTHIER AQUARIUM BENEFITS OF BIO-ACTIV LIVE AFRICAN CICHLID SUBSTRATES Reduces harmful nitrate Maintains proper pH for the life of the aquarium Provide enhanced buffering capacity Provides essential inorganic elements such as strontium, cobalt, zinc and Molybdenum