1, the door is a wide place outside the door. There are pebbles in the river, so build by laying bricks or stones with sand ash one by one. Be careful when you build by laying bricks or stones, and put more sand ash, otherwise there will be cracks and water leakage. Look at the water when you build it. If there is leakage, make it up in time. If there is no leakage, drain it. When the water is ready, put some disinfectant to disinfect it first, and then put the fry.

2. If there is no requirement to build a pool, use a slightly larger basin or bucket. First clean up, disinfect and put some fry with high survival rate. It's not very elegant to raise fish in a basin. The only advantage is that it can be moved and cleaned by changing water.