The basic conditions for a biological equilibrium level include a stable PH and a high buffer capacity. With enriched calcium, magnesium, strontium, and iron, manganese, iodine, selenium and dozens of sufficient trace elements. Does not contain nitrate, ammonium salt, phosphate and other harmful substances. It is especially suitable for aquaculture of coral reef organisms in closed systems. This product is suitable for aquaculture of hard coral, cartilage coral and ornamental fish