Consider that there is a mass mortality of Ashes in a pond. Guess, what may be the reason for that.

Consider that there is a mass mortality of Ashes in a pond. Guess, wha

1.	Consider that there is a mass mortality of Ashes in a pond. Guess, what may be the reason for that.
Answer» Addition of hot water to the fish tank may leads to their death. Addition of poisonous mercury compounds in water may leads to their death. Blockage of gills of fishes with any pollutant may be .a cause for their mass death.