Which of the following is not true about adding organic manure to a fish pond? it

The option that is not true about adding organic manure to a fish pond is: "reduces the pH of water considerably". Organic manure in a fish pond accelerates the growth of planktons, which are used by fish as a source of food. However, the decomposition of organic manure in the water leads to the depletion of oxygen, which is harmful to fish. Additionally, the decomposition process releases harmful gases that pollute the water and make it unsuitable for fish. Adding organic manure to a fish pond may slightly increase the pH of the water, but it would not reduce it considerably.