African Cichlid Substrates Rift Lake Gravel - Dry Provides Rift Lake Environment Perfect for African Cichlid African Cichlid Substrates - DRY Beneficial Characteristics 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 Essential Trace Elements Provided by Aragonite Zinc Sulphate, Calcium Chloride, Manganese Chloride, Cobalt Chloride, Copper Sulphate, Sodium Molybdate, Strontium Chloride, Nickel Chloride, Potassium Bromide, Sodium Silicate.