Wear gloves and a mask when using it. Chemical Methods 13. Broadcast the lime over the pond surface. Broadcast the lime over the pond surface. 20 liters of bleaching solution per hectare in water 2 cm deep.
Chlorine is the fish killing agent.
First dissolve the powder in water and then broadcast over the pond surface. Calcium hypochlorite is a solid powder. It can burn the lungs if inhaled. A filter mask should be worn or breath held until the powder is safely in water. Ammonia is the agent affecting fish.