Tilapia is a tropical fish. It is not tolerant of low temperatures and it is necessary to adopt insulation measures in order to survive the winter. Conservation measures for wintering are as follows.

1. The wintering of the greenhouse. The glass house roof can be used in the greenhouse to increase the room temperature by using solar energy, and the roof can be covered with straw curtains at night to reduce the room temperature. The heating system can be closed to the temperature of about 6 degrees Celsius. The greenhouses face the south and are rectangular. The roof canopy is supported by steel and the roof is covered with glass. Generally, a wintering pool of 7 meters in length, 5 meters in width and 2 meters in depth can be built in the house. Well water is the best source of water. Per square meter of water can be put over 8 kg of overwintering fish species. In addition, plastic greenhouses can be built to allow tilapia to safely pass winter.

2. Overwintering in hot spring water or well water (water temperature around 16 degrees Celsius). The hot spring water can enter the overwintering pool through the pipeline or the ditch. The temperature of the hot spring water entering the overwintering pool should be maintained at about 22 degrees Celsius. The wintering pool is generally 120 square meters, with a water depth of 1.3 meters. It can hold more than 1,000 kilograms of fish or 500 kilograms of broodstock. It is also possible to place fish species directly in winter in large wells with temperatures above 16 degrees Celsius.

3. Use the power of the power plant to overwinter. The thermostat pool is located not far away from the power plant, with an area of ​​about 36 square meters and a water depth of 1.2 meters. First adjust the water temperature in the temperature control tank, and then let the water flow into the fish pond. The aquarium is round, with a dyeing section of rice, with an area of ​​about 7 square meters. The bottom of the pool is shaped like a pot. There is a drainage hole at the center and a sewage valve is set. The residual bait and feces can be discharged from the fish pond at any time.

It is important to note that no matter what method is used for wintering, the overwintering pool should be disinfected with 1ppm bleach before wintering, and the overwintering pool should be checked for leakage. The general stocking density is about 7 kilograms per square meter, and the temperature-flowing pool can stock 25 kilograms per square meter. During the winter, it is necessary to do a good job of regulating water quality. Every day, it is necessary to feed a small amount of tilapia-like food. The water temperature in the wintering pool must not be lower than 16 degrees Celsius. Every 20 days or so, 5% salt water or copper sulphate and ferrous sulphate should be used in proportion to the requirement of Quanchiposa and insecticide sterilization.

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