(1) area and depth: the appropriate area is 30 ~ 50m2, and the maximum is1100m2. The tank wall can be made of clay or cement brick, and the water depth is 1.2 ~ 2m.

(2) Shape and water flow: The shapes of living water fish ponds can be square, rectangular, octagonal, round and oval, among which rectangular, round and oval fish ponds are more common.

Rectangular running pool: the water in the pool flows in the same direction and flows to the drain. Rectangular pool has high land utilization rate and convenient construction.

Circular flowing water pool: The whole pool is funnel-shaped, with drainage and sewage discharge at the bottom center, reasonable structure and no vortex, and the fish in the pool are evenly distributed, but it is difficult to treat after the bottom net cover is sealed by dirt, and the cost is high.

Oval running pond: A fish pond designed by combining a circular pond and a rectangular pond basically maintains the advantages of the circular pond and the rectangular pond.