Which of the following pond maintenance operation will ensure adequate supply of oxygen and hygienic condition for fish in a pond?

Deweeding is the pond maintenance operation that will ensure adequate supply of oxygen and hygienic condition for fish in a pond. Weeds and other aquatic plants can grow rapidly in fish ponds and can reduce the oxygen supply in the water, leading to poor water quality and fish mortality. By removing weeds and other aquatic plants from the pond, more oxygen can dissolve in the water and the water quality can improve. This helps to create a more suitable environment for the fish to grow and thrive. Deweeding also helps to prevent the buildup of organic matter in the pond, which can contribute to the growth of harmful bacteria and parasites. Removing weeds and other debris from the pond can also help to prevent clogging of the pond and maintain a steady flow of water, which is essential for the health and wellbeing of the fish. In summary, deweeding is an important pond maintenance operation that ensures adequate supply of oxygen and hygienic conditions for fish in a pond by removing weeds and other aquatic plants, preventing the buildup of organic matter, and maintaining a steady flow of water.