Even the lotus leaves turn color at the end of the season. They lose their chlorophyll and the yellows and browns in the leaves show through. Eventually, the leaves shrivel and die and fall into the water to decompose. With the amount of leaves in the pond, one would think that the pond would fill with decomposed matter. Fortunately, the process does not quickly change the pond and the spring will bring renewed growth. It has been a gorgeous season with about 500 lotus blooms decorating the pond for 2 months.