1, does not occupy cultivated land, and the roof is flat, so the investment in building the pool is small. Because the water storage is shallow, it is suitable for general roofs.

2. It can be used for ornamental breeding and commercial development, and it is a good way to get rich quickly with less investment.

Planting flowers, fruits and vegetables to shade fish ponds can beautify the environment, purify the air and cultivate people's sentiments.

4. It can prevent heatstroke and cool down, playing the role of being warm in winter and cool in summer.

This is easier to manage than land cultivation.

Generally, each fish is 5-20 square meters, the water storage depth of the pond is 30 cm, and the wall of the pond is 40-50 cm high. The ponds are connected in rows, which is convenient for operation, water intake and drainage, and independent of each other, and its water storage capacity is only 1/2 of the water demand of a single fish pond. The bottom (i.e. top) surface of the pool should be repainted with 200 cement mortar with a thickness of 3-5cm to prevent leakage. Install the inlet and outlet pipes.