1. Pond conditions. Ponds should be selected from the main pond crabs, white prawn or ponds mixed with shrimps and crabs.

2, oxygenation material selection. The oxygenation system is divided into three levels, namely, the main pipe, the branch pipe and the microporous aeration pipe. The aerator power is matched with three 3-kilowatt units. The total gas supply pipe is made of rigid plastic pipe with a diameter of 60mm. The branch gas supply pipe is a microporous rubber pipe with a diameter of 12mm.

3, installation method. The total gas supply pipe is located in the upper middle of the pond, which is 10 to 15 degrees higher than the maximum water level of the pool and runs through the entire pond in a north-south direction. Place a micro-hole tube horizontally at intervals of 8 meters on both sides of the main gas supply pipe. One end of the micro-hole tube is connected to the main gas supply pipe, and the other end extends to a distance of 1 meter from the pool, and the micro-hole tube is fixed at a high position with a bamboo pile. At the bottom of the pool at 10 to 15 degrees, it is distributed horizontally.

4, the use of technology. In the high temperature season, the microporous tube aeration facility should be maintained at 6 hours per day. In fine weather, the boot time should be from 2 am to sunrise the next day. In cloudy days, the oxygenation time can be appropriately extended depending on the situation. Keep the dissolved oxygen in the pond above 5mg/L.

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