Shield is a natural product that enhances growth, immunity and anti-disease ability. It lowers death rate and even control white spot when used with fishes. It absorbs toxins such as HNO2, NH3/4, NO3, H2S and assimilate orgnaic waste into micro-organism food, thus creating a balanced environment in high bio-load tank.
Dose 1 spoon / 200Liters of water after weekly water change to maintain quality. Use twice / weekly when you have poor water quality, high bio-load or unknown death of shrimps.