Volcanic sand is not easily disintegrated, does not pulverize, and can be effectively used for a long time. Containing dozens of minerals and trace elements such as sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt, and molybdenum, this natural honeycomb is porous and provides an excellent growth environment for nitrifying bacteria. Strong adsorption capacity, effectively adsorbing harmful substances in water; The material is stable and will not affect the growth of aquatic plants and fish and shrimp.
