Generally speaking, the surface area is 3-4 square meters, and it should not exceed 5 square meters at most. Because the fish pond is the finishing touch of the courtyard decoration, in order to set off the courtyard, if the excavation area of the fish pond is too large, it will be asymmetrical with the courtyard area, which is a bit presumptuous and taboo in geomantic omen. The depth of the pond is limited to 1m, the underground part is about 70cm, and the ground height is 30cm. This can limit the garden debris and accumulated water from entering the fish pond, causing the pond water to be turbid, which is not good for fish farming. The shape of the pool should be mainly natural, not too vertical, which is dull and inactive. The edge of the pool should be decorated with flowerpots scattered at different heights, so that the water in the pool is always fresh and the dissolved oxygen content is high, which is more conducive to raising ornamental fish. If you still want to plant some lotus flowers in the pool.